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&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: #000000; background-color: #ffce00; vertical-align: bottom; text-align: left; padding: 2pt 0 2pt 0;"&gt;Class name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: #000000; background-color: #ffce00; text-align: center; vertical-align: bottom; padding: 2pt 0 2pt 0;"&gt;Costs of a $10,000&lt;br/&gt;investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: #000000; background-color: #ffce00; text-align: center; vertical-align: bottom; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a &lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; color: #000000; overflow-x: hidden; font-size: 8pt; line-height: 10pt; text-align: left; vertical-align: bottom; padding: 4pt 0 2pt 0;"&gt;Institutional Shares&lt;/td&gt;
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      id="t_15_844e5195_396e_d87f_326b_96289c49196b"> &lt;div style="margin-bottom: 0px;"&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt; margin-top: 0px;"&gt;How did the Fund perform last year?&lt;/div&gt; &lt;/div&gt; &lt;ul style="break-inside: avoid; padding: 0; margin: 3.5pt 0 3.5pt 0;"&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: #000000; margin-left: 34px;"&gt; &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none;"&gt;For the reporting period ended January 31, 2025, the Fund's Institutional Shares returned 10.23%.&lt;/div&gt; &lt;/li&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: #000000; margin-left: 34px;"&gt; &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none;"&gt;For the same period, the Russell 1000&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; Index returned 26.71% and the FTSE Nareit All Equity REITs Net Index returned 10.06%.&lt;/div&gt; &lt;/li&gt; &lt;/ul&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: normal; font-size: 10pt; letter-spacing: normal; text-transform: none; color: #000000; margin-bottom: 5pt;"&gt;What contributed to absolute&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;performance?&lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 3.5pt;"&gt;In sector terms, positive contributions were led by holdings of health care, apartment, data center, retail and triple net lease real estate investment trusts (&#x201c;REITs&#x201d;). Leading individual contributors included a health care infrastructure investor, a data center and colocation provider, a multifamily housing investor, a triple net lease retail space provider, and a shopping mall investor.&lt;/div&gt; &lt;/div&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: normal; font-size: 10pt; letter-spacing: normal; text-transform: none; color: #000000; margin-bottom: 5pt;"&gt;What detracted from absolute&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;performance?&lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 3.5pt;"&gt;In sector terms, detractors included holdings within industrial and tower REITs. Individual positions that weighed most heavily on return included an investor in post-acute care facilities and senior living communities, an investor in Southern California industrial properties, a cold storage solutions provider, a wireless infrastructure operator, and an investor in single-family rental homes.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 3.5pt;"&gt;&lt;i&gt;The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.&lt;/i&gt;&lt;/div&gt; &lt;/div&gt; </oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2025_C000118601Member"
      id="t_14_ebe65ee5_0268_2cdd_f49e_72145a23da65"> &lt;div style="break-inside: avoid;"&gt; &lt;div style="margin-bottom: 5pt;"&gt; &lt;div style="break-inside: avoid;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;" title="oef:FactorsAffectingPerfTextBlock"&gt;Fund performance&lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; text-align: justify; font-size: 9pt; line-height: 11.4pt; color: #000000; margin-bottom: 0px;"&gt;Cumulative performance: February 1, 2015 through January 31, 2025&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; text-align: justify; font-size: 9pt; line-height: 11.4pt; color: #000000; margin-bottom: 0px;"&gt;Initial investment of $10,000&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 5pt; margin-bottom: 5pt;"&gt;
&lt;img alt="Fund Performance - Growth of 10K" src="g936435chartimages_9549736.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 525pt;"/&gt; &lt;/div&gt; &lt;div style="padding-left: 10pt; margin-bottom: 7.2pt;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 0px;"&gt;See &#x201c;Average annual total returns&#x201d; for additional information on fund performance.&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; </oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2025_C000118601Member"
      id="t_12_6e80735e_96a6_74cd_1907_db163697048f"> &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;Average annual total returns&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; overflow-x: hidden; width: 100%; text-indent: -6pt; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; vertical-align: bottom; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Institutional Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;10.23&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;span style="display: inline; visibility: initial; margin-left: initial;"&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;3.54&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;span style="display: inline; visibility: initial; margin-left: initial;"&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;5.26&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;span style="display: inline; visibility: initial; margin-left: initial;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; vertical-align: bottom; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Russell 1000&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;26.71&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;14.97&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;13.54&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; vertical-align: bottom; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;FTSE Nareit All Equity REITs Net Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;10.06&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.09&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.09&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_C000118601Member"
      id="t_13_d325432b_c60b_5e16_95cc_7f997fb6ad4f">Institutional Shares</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_C000118601Member"
      decimals="4"
      id="h_3_372baac6_6985_4c4e_a21b_1f2f54aa9c81"
      unitRef="pure">0.1023</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_C000118601Member"
      decimals="4"
      id="h_4_c79742a3_11d4_445d_9786_b25ed779bfe4"
      unitRef="pure">0.0354</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_C000118601Member"
      decimals="4"
      id="h_5_7931b1f9_faa7_4b99_80ab_61c22e2b2cc5"
      unitRef="pure">0.0526</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_Russell1000IndexMember"
      id="t_16_bc4dd5a1_ff7d_c8ca_f488_7021884a0378">Russell 1000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_Russell1000IndexMember"
      decimals="4"
      id="h_6_4aa5ef29_02fc_4227_a7b8_39d1b49e5e79"
      unitRef="pure">0.2671</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_Russell1000IndexMember"
      decimals="4"
      id="h_7_56c5b60b_093c_4744_920a_7c3b8d2c29f3"
      unitRef="pure">0.1497</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_Russell1000IndexMember"
      decimals="4"
      id="h_8_acd6a6d1_d3b3_4fc6_bd69_db7c6c91a4e2"
      unitRef="pure">0.1354</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_FTSENareitAllEquityREITsNetIndexMember"
      id="t_17_dbf7d1e0_dd54_75c6_eb40_58c1dfa50ce4">FTSE Nareit All Equity REITs Net Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_FTSENareitAllEquityREITsNetIndexMember"
      decimals="4"
      id="h_9_05c0bee4_3c72_45f8_a14e_d01ce6917ed9"
      unitRef="pure">0.1006</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_FTSENareitAllEquityREITsNetIndexMember"
      decimals="4"
      id="h_10_5742c120_1ab5_4363_909e_0f0565bf74b2"
      unitRef="pure">0.0209</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_FTSENareitAllEquityREITsNetIndexMember"
      decimals="4"
      id="h_11_80c893a9_84ca_428c_96ba_81805f50012b"
      unitRef="pure">0.0409</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2025_C000118601Member"
      id="t_18_364d7b9a_4b39_83e8_009a_016b76084bfe"> &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Key Fund statistics&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Net Assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 0 6pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;344,489,738&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 0 6pt;"&gt;44&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Net Investment Advisory Fees&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 0 6pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;1,797,078&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20250131_C000118601Member"
      decimals="INF"
      id="h_12_771d271a_521d_4348_9ae8_6241e696f5d3"
      unitRef="USD">344489738</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20250131_C000118601Member"
      decimals="INF"
      id="h_13_1254bee9_fd49_4e2e_a7ae_fa90ed8e0eeb"
      unitRef="Holding">44</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2025_C000118601Member"
      decimals="INF"
      id="h_14_c84247ae_9e61_449c_8096_9f5c30192e1f"
      unitRef="USD">1797078</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2025_C000118601Member"
      decimals="4"
      id="h_15_17e40897_2ccc_442a_a926_bdb84d2cc377"
      unitRef="pure">0.59</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2025_C000118601Member"
      id="t_19_e4daf7cd_0d1e_d475_8a15_39b4a79f138d">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2025_C000118601Member"
      id="t_20_18ed194c_dca2_8a05_6467_ce4e4c5e0e5d">Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2025_C000118601Member"
      id="t_21_c179f977_8653_2a35_b600_d2ad67bbdb32">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;blackrock.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="FY2025_C000118601Member"
      id="t_23_0febfa1c_feca_257d_0aeb_4b6706477362"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;What did the Fund invest in?&lt;/div&gt;  &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; text-align: justify; font-size: 9pt; line-height: 11.4pt; color: #000000; margin-bottom: 0px;"&gt;(as of January 31, 2025)&lt;/div&gt;  &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;&lt;b&gt;Industry allocation&lt;/b&gt;&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; vertical-align: bottom; text-indent: -6pt; width: auto; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Industry&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Percent of&lt;br/&gt;Net Assets&lt;/em&gt;&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; font-kerning: none; text-align: left; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 6pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Specialized REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;37.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Retail REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;14.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Residential REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;13.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Health Care REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;12.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Industrial REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;12.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Office REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;3.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Hotel &amp;amp; Resort REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;2.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Diversified REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;1.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Short-Term Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;1.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;Other Assets Less Liabilities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 1.6pt 0;"&gt;0.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;  &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;&lt;b&gt;Ten largest holdings&lt;/b&gt;&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Security&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;em&gt;Percent of&lt;br/&gt;Net Assets&lt;/em&gt;&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; font-kerning: none; text-align: left; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Prologis, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;9.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Equinix, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;7.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;American Tower Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;6.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;AvalonBay Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;5.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Welltower, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Simon Property Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Mid-America Apartment Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;SBA Communications Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;VICI Properties, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;3.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;Extra Space Storage, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 1.6pt 0;"&gt;3.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse: collapse; break-inside: avoid-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; width: initial; text-indent: 0; color: #000000; padding: 1.6pt 6pt 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; width: 100%; padding: 1.6pt 0 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;For purposes of this report, industry sub-classifications may differ from those utilized&#160;by the Fund for compliance purposes.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; vertical-align: top; text-indent: 0; padding: 0 6pt 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; width: 100%; padding: 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes short-term securities.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_SpecializedREITsMember"
      decimals="4"
      id="h_16_fafbebf2_608e_43a2_b8d5_79b7c630e2ab"
      unitRef="pure">0.377</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_RetailREITsMember"
      decimals="4"
      id="h_17_6801df8f_b975_4812_81ac_c219bd8213f9"
      unitRef="pure">0.146</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_ResidentialREITsMember"
      decimals="4"
      id="h_18_400d841c_f7f8_4007_a68f_d6e421aacf52"
      unitRef="pure">0.137</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_HealthCareREITsMember"
      decimals="4"
      id="h_19_7a35f848_0632_42f7_b096_911aefbecaee"
      unitRef="pure">0.126</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_IndustrialREITsMember"
      decimals="4"
      id="h_20_2d808a8c_7eb7_42f7_8d9b_7e65351c2072"
      unitRef="pure">0.125</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_OfficeREITsMember"
      decimals="4"
      id="h_21_6817aa1d_54a5_401f_86f9_d23304af7a49"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_HotelAndResortREITsMember"
      decimals="4"
      id="h_22_67f000ab_ffa4_4a67_9b44_2ffe68b30407"
      unitRef="pure">0.025</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_DiversifiedREITsMember"
      decimals="4"
      id="h_23_77c04233_f655_47fe_be79_5375505c3d11"
      unitRef="pure">0.014</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_ShortTermInvestmentsMember"
      decimals="4"
      id="h_24_7eda7123_72b0_4559_84cd_95e7fe7482ff"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_OtherAssetsLessLiabilitiesMember"
      decimals="4"
      id="h_25_ea7db98a_89e5_4b71_b2f4_4a64fdc9b042"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2025_C000118601Member"
      id="t_22_dd963a32_1c3c_f770_6ff0_949dbbd18cf4">  &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;&lt;b&gt;Ten largest holdings&lt;/b&gt;&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Security&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;em&gt;Percent of&lt;br/&gt;Net Assets&lt;/em&gt;&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; font-kerning: none; text-align: left; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Prologis, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;9.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Equinix, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;7.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;American Tower Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;6.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;AvalonBay Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;5.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Welltower, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Simon Property Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Mid-America Apartment Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;SBA Communications Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;VICI Properties, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;3.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;Extra Space Storage, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 1.6pt 0;"&gt;3.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;  (b)Excludes short-term securities.</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_PrologisIncMember"
      decimals="4"
      id="h_26_a4e0539a_b8b2_4d00_bb4b_c7b8a7f7edf0"
      unitRef="pure">0.091</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_EquinixIncMember"
      decimals="4"
      id="h_27_9a352584_43a1_49ab_b748_564b0de32c68"
      unitRef="pure">0.072</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_AmericanTowerCorpMember"
      decimals="4"
      id="h_28_cf82f483_2825_47e5_93fa_7ee1d34a27a7"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_AvalonBayCommunitiesIncMember"
      decimals="4"
      id="h_29_05fb95cc_91bc_41f5_a608_f35583cc39d4"
      unitRef="pure">0.053</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_WelltowerIncMember"
      decimals="4"
      id="h_30_a51fab13_7d2a_40bd_95cb_fa79807cf3d0"
      unitRef="pure">0.049</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_SimonPropertyGroupIncMember"
      decimals="4"
      id="h_31_509967b0_1d6c_4c23_9b91_d8bbc5755692"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_MidAmericaApartmentCommunitiesIncMember"
      decimals="4"
      id="h_32_04b59959_494b_4d80_a47b_cc2f21eba964"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_SBACommunicationsCorpMember"
      decimals="4"
      id="h_33_79f49a09_017e_4273_8826_b19c7dafe007"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_VICIPropertiesIncMember"
      decimals="4"
      id="h_34_7e50b76a_5a03_496e_b481_7a2b47ccc7e6"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118601Member_ExtraSpaceStorageIncMember"
      decimals="4"
      id="h_35_07f58dc7_c92c_4ee9_bf0a_130bfb2da2ad"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2025_C000118599Member"
      id="t_1_d70c1bb6_a960_c6ca_7c65_81bb62a6a2f1">BlackRock Real Estate Securities Fund</oef:FundName>
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      contextRef="FY2025_C000118599Member"
      id="t_2_b7972361_2c30_5358_ea58_092392b23199">Investor A Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2025_C000118599Member"
      id="t_3_4fe41978_237a_e5f6_d8b3_e5e6a4af7f6c">BAREX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2025_C000118599Member"
      id="t_4_230ab27b_bfc8_32a6_6773_751ace56b375">This annual shareholder report contains important information about BlackRock Real Estate Securities Fund (the &#x201c;Fund&#x201d;) for the period of February 1, 2024 to January 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2025_C000118599Member"
      id="t_5_8e9b82d4_c462_d12a_e93d_9a6a6b874c37">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2025_C000118599Member"
      id="t_6_7023a706_094b_69f9_2abf_848dbdcc01ca">You can find additional information about the Fund at &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;blackrock.com/fundreports&lt;/span&gt;. You can also request this information by contacting us at (800) 441&#x2011;7762.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2025_C000118599Member"
      id="t_7_892cde34_4209_4d07_e4ea_36c8533676b7">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2025_C000118599Member"
      id="t_8_f93be58e_5882_3c13_a827_5adc1115fb21">(800) 441&#x2011;7762</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2025_C000118599Member"
      id="t_9_1553427d_dc2f_01c1_681f_b419048dd65f"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;" title="oef:ExpensesTextBlock"&gt;What were the Fund costs for the last year?&lt;/div&gt;  &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none; font-family: 'arial'; font-size: 9pt; color: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: #000000; background-color: #ffce00; vertical-align: bottom; text-align: left; padding: 2pt 0 2pt 0;"&gt;Class name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: #000000; background-color: #ffce00; text-align: center; vertical-align: bottom; padding: 2pt 0 2pt 0;"&gt;Costs of a $10,000&lt;br/&gt;investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: #000000; background-color: #ffce00; text-align: center; vertical-align: bottom; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a &lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; color: #000000; overflow-x: hidden; font-size: 8pt; line-height: 10pt; text-align: left; vertical-align: bottom; padding: 4pt 0 2pt 0;"&gt;Investor A Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: center; font-size: 8pt; line-height: 10pt; vertical-align: bottom; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;105&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; text-align: center; font-size: 8pt; line-height: 10pt; vertical-align: bottom; padding: 4pt 0 2pt 0;"&gt;1.00&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2025_C000118599Member"
      decimals="INF"
      id="h_36_17a27a03_53d0_4e37_8d59_535d029048a2"
      unitRef="USD">105</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2025_C000118599Member"
      decimals="4"
      id="h_37_d1b7a2da_3fe9_466b_98f1_26693bcd53f5"
      unitRef="pure">0.0100</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2025_C000118599Member"
      id="t_10_dcddf9e1_c865_87ac_3282_8a3cde917078"> &lt;div style="margin-bottom: 0px;"&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt; margin-top: 0px;"&gt;How did the Fund perform last year?&lt;/div&gt; &lt;/div&gt; &lt;ul style="break-inside: avoid; padding: 0; margin: 3.5pt 0 3.5pt 0;"&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: #000000; margin-left: 34px;"&gt; &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none;"&gt;For the reporting period ended January 31, 2025, the Fund's Investor A Shares returned 10.03%.&lt;/div&gt; &lt;/li&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: #000000; margin-left: 34px;"&gt; &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none;"&gt;For the same period, the Russell 1000&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; Index returned 26.71% and the FTSE Nareit All Equity REITs Net Index returned 10.06%.&lt;/div&gt; &lt;/li&gt; &lt;/ul&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: normal; font-size: 10pt; letter-spacing: normal; text-transform: none; color: #000000; margin-bottom: 5pt;"&gt;What contributed to absolute&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;performance?&lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 3.5pt;"&gt;In sector terms, positive contributions were led by holdings of health care, apartment, data center, retail and triple net lease real estate investment trusts (&#x201c;REITs&#x201d;). Leading individual contributors included a health care infrastructure investor, a data center and colocation provider, a multifamily housing investor, a triple net lease retail space provider, and a shopping mall investor.&lt;/div&gt; &lt;/div&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: normal; font-size: 10pt; letter-spacing: normal; text-transform: none; color: #000000; margin-bottom: 5pt;"&gt;What detracted from absolute&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;performance?&lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 3.5pt;"&gt;In sector terms, detractors included holdings within industrial and tower REITs. Individual positions that weighed most heavily on return included an investor in post-acute care facilities and senior living communities, an investor in Southern California industrial properties, a cold storage solutions provider, a wireless infrastructure operator, and an investor in single-family rental homes.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 3.5pt;"&gt;&lt;i&gt;The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.&lt;/i&gt;&lt;/div&gt; &lt;/div&gt; </oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2025_C000118599Member"
      id="t_11_c79aa104_cfa2_c488_aad5_9d17300dd7b2"> &lt;div style="break-inside: avoid;"&gt; &lt;div style="margin-bottom: 5pt;"&gt; &lt;div style="break-inside: avoid;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;" title="oef:FactorsAffectingPerfTextBlock"&gt;Fund performance&lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; text-align: justify; font-size: 9pt; line-height: 11.4pt; color: #000000; margin-bottom: 0px;"&gt;Cumulative performance: February 1, 2015 through January 31, 2025&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; text-align: justify; font-size: 9pt; line-height: 11.4pt; color: #000000; margin-bottom: 0px;"&gt;Initial investment of $10,000&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 5pt; margin-bottom: 5pt;"&gt;
&lt;img alt="Fund Performance - Growth of 10K" src="g936435chartimages_9549737.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 525pt;"/&gt; &lt;/div&gt; &lt;div style="padding-left: 10pt; margin-bottom: 7.2pt;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 0px;"&gt;See &#x201c;Average annual total returns&#x201d; for additional information on fund performance.&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; </oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2025_C000118599Member"
      id="t_12_e9ca7d3c_9ec8_5c53_5e8d_dd3d72d0aae2"> &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;Average annual total returns&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; overflow-x: hidden; width: 100%; text-indent: -6pt; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; vertical-align: bottom; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Investor A Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;10.03&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;span style="display: inline; visibility: initial; margin-left: initial;"&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;3.28&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;span style="display: inline; visibility: initial; margin-left: initial;"&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.99&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;span style="display: inline; visibility: initial; margin-left: initial;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; vertical-align: bottom; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Investor A Shares (with sales charge)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.25&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.17&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.43&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; vertical-align: bottom; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Russell 1000&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;26.71&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;14.97&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;13.54&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; vertical-align: bottom; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;FTSE Nareit All Equity REITs Net Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;10.06&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.09&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.09&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AvgAnnlRtrTableTextBlock>
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      unitRef="pure">0.1003</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_C000118599Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_39_356d3b12_6e89_47dc_a974_7d5e4e205237"
      unitRef="pure">0.0328</oef:AvgAnnlRtrPct>
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      id="h_40_cd2e6570_4a4e_4ea5_8e37_c641635dda39"
      unitRef="pure">0.0499</oef:AvgAnnlRtrPct>
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      id="t_14_b60ab1f7_b05e_66ef_02c0_bc8275458414">Investor A Shares (with sales charge)</oef:LineGraphAndTableMeasureName>
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      unitRef="pure">0.0425</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_43_26286e25_2caa_47c0_9abe_25a9a22d60c4"
      unitRef="pure">0.0443</oef:AvgAnnlRtrPct>
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      contextRef="FY2025_Russell1000IndexMember"
      id="t_15_b4ff95af_a3d5_0464_b5d4_6b201ee2699d">Russell 1000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_44_ecd1f293_9f99_4856_93c3_24d598c004b7"
      unitRef="pure">0.2671</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_Russell1000IndexMember"
      decimals="4"
      id="h_45_fa3befdb_562f_4714_9058_96df9cbb6c3e"
      unitRef="pure">0.1497</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_Russell1000IndexMember"
      decimals="4"
      id="h_46_08d264a9_24a6_4816_8dfc_ffe231bed4eb"
      unitRef="pure">0.1354</oef:AvgAnnlRtrPct>
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      contextRef="FY2025_FTSENareitAllEquityREITsNetIndexMember"
      id="t_16_b01e61c7_f928_aef6_3c4d_6b8ed8f508df">FTSE Nareit All Equity REITs Net Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_FTSENareitAllEquityREITsNetIndexMember"
      decimals="4"
      id="h_47_462fdace_d4df_4741_93b0_d1fe8819e309"
      unitRef="pure">0.1006</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_FTSENareitAllEquityREITsNetIndexMember"
      decimals="4"
      id="h_48_0cf331c2_9fa6_48f2_9cc6_1d5a1cc766c0"
      unitRef="pure">0.0209</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_FTSENareitAllEquityREITsNetIndexMember"
      decimals="4"
      id="h_49_7cdd54f4_ffef_4d4e_8d2a_c38e7d9369a1"
      unitRef="pure">0.0409</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2025_C000118599Member"
      id="t_17_8a405278_c6cb_cc9e_da5b_fd8dab9e2a51"> &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Key Fund statistics&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Net Assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 0 6pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;344,489,738&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 0 6pt;"&gt;44&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Net Investment Advisory Fees&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 0 6pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;1,797,078&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
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      unitRef="USD">344489738</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      id="h_51_18c69665_0bd6_4fad_b0a1_3415300affb3"
      unitRef="Holding">44</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
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      id="h_52_920cc1bd_27b5_41c1_994c_4d3268031496"
      unitRef="USD">1797078</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
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      decimals="4"
      id="h_53_b75984d9_e120_4325_b08f_6cdbeb1734bf"
      unitRef="pure">0.59</us-gaap:InvestmentCompanyPortfolioTurnover>
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      contextRef="FY2025_C000118599Member"
      id="t_19_197fc2a9_c4de_16f8_7d84_b5690e7f67b8">Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2025_C000118599Member"
      id="t_20_09fb36f4_33c2_ea32_b4fd_7bccc4fad049">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;blackrock.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="FY2025_C000118599Member"
      id="t_21_6c2a1eb1_1342_5ee0_b479_25604135439f"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;What did the Fund invest in?&lt;/div&gt;  &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; text-align: justify; font-size: 9pt; line-height: 11.4pt; color: #000000; margin-bottom: 0px;"&gt;(as of January 31, 2025)&lt;/div&gt;  &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;&lt;b&gt;Industry allocation&lt;/b&gt;&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; vertical-align: bottom; text-indent: -6pt; width: auto; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Industry&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Percent of&lt;br/&gt;Net Assets&lt;/em&gt;&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; font-kerning: none; text-align: left; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 6pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Specialized REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;37.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Retail REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;14.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Residential REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;13.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Health Care REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;12.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Industrial REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;12.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Office REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;3.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Hotel &amp;amp; Resort REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;2.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Diversified REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;1.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Short-Term Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;1.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;Other Assets Less Liabilities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 1.6pt 0;"&gt;0.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;   &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;&lt;b&gt;Ten largest holdings&lt;/b&gt;&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Security&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;em&gt;Percent of&lt;br/&gt;Net Assets&lt;/em&gt;&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; font-kerning: none; text-align: left; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Prologis, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;9.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Equinix, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;7.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;American Tower Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;6.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;AvalonBay Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;5.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Welltower, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Simon Property Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Mid-America Apartment Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;SBA Communications Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;VICI Properties, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;3.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;Extra Space Storage, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 1.6pt 0;"&gt;3.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse: collapse; break-inside: avoid-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; width: initial; text-indent: 0; color: #000000; padding: 1.6pt 6pt 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; width: 100%; padding: 1.6pt 0 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;For purposes of this report, industry sub-classifications may differ from those utilized&#160;by the Fund for compliance purposes.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; vertical-align: top; text-indent: 0; padding: 0 6pt 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; width: 100%; padding: 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes short-term securities.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_SpecializedREITsMember"
      decimals="4"
      id="h_54_5a346f3c_6cb5_4d84_94a7_7d975222fbce"
      unitRef="pure">0.377</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_RetailREITsMember"
      decimals="4"
      id="h_55_fe6cb3c2_d7a4_4e59_b6e7_f75f44ac9d3d"
      unitRef="pure">0.146</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_ResidentialREITsMember"
      decimals="4"
      id="h_56_fe85b014_e904_4950_a207_164d3150b9f9"
      unitRef="pure">0.137</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_HealthCareREITsMember"
      decimals="4"
      id="h_57_45b69838_2870_4c4a_8716_c122c162ab3f"
      unitRef="pure">0.126</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_IndustrialREITsMember"
      decimals="4"
      id="h_58_132cc8d8_8a79_44cb_b26a_0feee5448251"
      unitRef="pure">0.125</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_OfficeREITsMember"
      decimals="4"
      id="h_59_f4b1f224_dece_46f5_ad83_f0b0b7965dfd"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_HotelAndResortREITsMember"
      decimals="4"
      id="h_60_0bef14fe_1185_4717_8d07_fa82eb2f0700"
      unitRef="pure">0.025</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_DiversifiedREITsMember"
      decimals="4"
      id="h_61_7d6ff748_d885_49cc_874c_aa44a71f204e"
      unitRef="pure">0.014</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_ShortTermInvestmentsMember"
      decimals="4"
      id="h_62_e4d9f325_24a6_43d9_9cb3_fd2d6fd8c9db"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_OtherAssetsLessLiabilitiesMember"
      decimals="4"
      id="h_63_43102919_ce61_4546_8b03_af9a0a74e23d"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2025_C000118599Member"
      id="t_22_b66f8e7d_9de8_0f39_de39_735fd36d81e7"> &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;&lt;b&gt;Ten largest holdings&lt;/b&gt;&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Security&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;em&gt;Percent of&lt;br/&gt;Net Assets&lt;/em&gt;&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; font-kerning: none; text-align: left; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Prologis, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;9.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Equinix, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;7.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;American Tower Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;6.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;AvalonBay Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;5.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Welltower, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Simon Property Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Mid-America Apartment Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;SBA Communications Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;VICI Properties, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;3.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;Extra Space Storage, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 1.6pt 0;"&gt;3.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; (b)Excludes short-term securities.</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_PrologisIncMember"
      decimals="4"
      id="h_64_4f9d0fe0_9992_42b6_b847_9367024d6775"
      unitRef="pure">0.091</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_EquinixIncMember"
      decimals="4"
      id="h_65_65762109_9118_46f7_ae23_b5489f2148b0"
      unitRef="pure">0.072</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_AmericanTowerCorpMember"
      decimals="4"
      id="h_66_b7481d63_60eb_4c8a_8734_88c6175077dc"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_AvalonBayCommunitiesIncMember"
      decimals="4"
      id="h_67_b886c497_8084_4344_9afb_e220eb0866a5"
      unitRef="pure">0.053</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_WelltowerIncMember"
      decimals="4"
      id="h_68_ac1efe5d_87cc_4528_aa97_3cc4cac526cc"
      unitRef="pure">0.049</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_SimonPropertyGroupIncMember"
      decimals="4"
      id="h_69_fa6b362a_2ff5_42aa_ae19_2ded8adbdd70"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_MidAmericaApartmentCommunitiesIncMember"
      decimals="4"
      id="h_70_035cef0e_74c2_444e_ba19_b9738514ce11"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_SBACommunicationsCorpMember"
      decimals="4"
      id="h_71_d8a8f5a8_ae30_4903_a2a0_0f0a7b40d75d"
      unitRef="pure">0.041</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_VICIPropertiesIncMember"
      decimals="4"
      id="h_72_4533a1e4_8795_4d3c_9fb7_dd01ec7f551c"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118599Member_ExtraSpaceStorageIncMember"
      decimals="4"
      id="h_73_0a562070_e30c_4be1_adc6_144391057ab3"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:FundName
      contextRef="FY2025_C000118600Member"
      id="t_1_4f30ef3c_43f9_37f8_95d2_0e14cd4725b3">BlackRock Real Estate Securities Fund</oef:FundName>
    <oef:ClassName
      contextRef="FY2025_C000118600Member"
      id="t_2_19d4a280_04e3_90bc_b329_7dbbd60d724b">Investor C Shares</oef:ClassName>
    <dei:TradingSymbol
      contextRef="FY2025_C000118600Member"
      id="t_3_65d9b689_1199_6854_65ab_6a2768aab9f5">BCREX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2025_C000118600Member"
      id="t_4_92fe70da_7d8a_91e2_19f3_a5319254cb2c">This annual shareholder report contains important information about BlackRock Real Estate Securities Fund (the &#x201c;Fund&#x201d;) for the period of February 1, 2024 to January 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2025_C000118600Member"
      id="t_6_7088fa0f_91bd_7501_81a2_d93abf88cdba">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2025_C000118600Member"
      id="t_5_22cf0c55_aa65_b5e6_06b8_b37e71ee55a0">You can find additional information about the Fund at &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;blackrock.com/fundreports&lt;/span&gt;. You can also request this information by contacting us at (800) 441&#x2011;7762.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2025_C000118600Member"
      id="t_7_51c49a4f_add8_7d91_0d67_c852cce4d785">blackrock.com/fundreports</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2025_C000118600Member"
      id="t_8_3a9f3129_19ae_f1dc_11dd_7a3ce0a8bff6">(800) 441&#x2011;7762</oef:AddlInfoPhoneNumber>
    <oef:ExpensesTextBlock
      contextRef="FY2025_C000118600Member"
      id="t_9_ff506d99_78bf_6afa_1cce_ced53b361ad1"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;" title="oef:ExpensesTextBlock"&gt;What were the Fund costs for the last year?&lt;/div&gt;  &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none; font-family: 'arial'; font-size: 9pt; color: #000000;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;
&lt;table style="break-inside: avoid-page; margin-top: 2pt; table-layout: auto; width: 100%; border-collapse: collapse;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: #000000; background-color: #ffce00; vertical-align: bottom; text-align: left; padding: 2pt 0 2pt 0;"&gt;Class name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: #000000; background-color: #ffce00; text-align: center; vertical-align: bottom; padding: 2pt 0 2pt 0;"&gt;Costs of a $10,000&lt;br/&gt;investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-weight: bold; font-size: 9pt; line-height: 11pt; color: #000000; background-color: #ffce00; text-align: center; vertical-align: bottom; padding: 2pt 0 2pt 0;"&gt;Costs paid as a percentage of a &lt;br/&gt;$10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; color: #000000; overflow-x: hidden; font-size: 8pt; line-height: 10pt; text-align: left; vertical-align: bottom; padding: 4pt 0 2pt 0;"&gt;Investor C Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: center; font-size: 8pt; line-height: 10pt; vertical-align: bottom; padding: 4pt 0 2pt 0;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;183&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; text-align: center; font-size: 8pt; line-height: 10pt; vertical-align: bottom; padding: 4pt 0 2pt 0;"&gt;1.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2025_C000118600Member"
      decimals="INF"
      id="h_74_e91aab84_7b0b_44ce_bf91_99bdecfa3a69"
      unitRef="USD">183</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2025_C000118600Member"
      decimals="4"
      id="h_75_8c96a435_e622_4966_8081_6df0863c8bcd"
      unitRef="pure">0.0175</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2025_C000118600Member"
      id="t_10_02c39d3b_77cd_faa9_0311_86c7da4ad791"> &lt;div style="margin-bottom: 0px;"&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt; margin-top: 0px;"&gt;How did the Fund perform last year?&lt;/div&gt; &lt;/div&gt; &lt;ul style="break-inside: avoid; padding: 0; margin: 3.5pt 0 3.5pt 0;"&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: #000000; margin-left: 34px;"&gt; &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none;"&gt;For the reporting period ended January 31, 2025, the Fund's Investor C Shares returned 9.18%.&lt;/div&gt; &lt;/li&gt; &lt;li style="padding-left: 4pt; font-family: 'Arial'; font-size: 8pt; line-height: 12.32pt; text-align: justify; list-style-type: disc; color: #000000; margin-left: 34px;"&gt; &lt;div style="margin-top: 0px; margin-bottom: 0px; font-kerning: none;"&gt;For the same period, the Russell 1000&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; Index returned 26.71% and the FTSE Nareit All Equity REITs Net Index returned 10.06%.&lt;/div&gt; &lt;/li&gt; &lt;/ul&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: normal; font-size: 10pt; letter-spacing: normal; text-transform: none; color: #000000; margin-bottom: 5pt;"&gt;What contributed to absolute&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;performance?&lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 3.5pt;"&gt;In sector terms, positive contributions were led by holdings of health care, apartment, data center, retail and triple net lease real estate investment trusts (&#x201c;REITs&#x201d;). Leading individual contributors included a health care infrastructure investor, a data center and colocation provider, a multifamily housing investor, a triple net lease retail space provider, and a shopping mall investor.&lt;/div&gt; &lt;/div&gt; &lt;div style="break-inside: avoid; margin-bottom: 3.5pt;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: normal; font-size: 10pt; letter-spacing: normal; text-transform: none; color: #000000; margin-bottom: 5pt;"&gt;What detracted from absolute&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;performance?&lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 3.5pt;"&gt;In sector terms, detractors included holdings within industrial and tower REITs. Individual positions that weighed most heavily on return included an investor in post-acute care facilities and senior living communities, an investor in Southern California industrial properties, a cold storage solutions provider, a wireless infrastructure operator, and an investor in single-family rental homes.&lt;/div&gt; &lt;/div&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 3.5pt;"&gt;&lt;i&gt;The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.&lt;/i&gt;&lt;/div&gt; &lt;/div&gt; </oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2025_C000118600Member"
      id="t_11_161c82a8_37ce_c8b9_fee5_b060f08143a5"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;" title="oef:FactorsAffectingPerfTextBlock"&gt;Fund performance&lt;/div&gt;  &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; text-align: justify; font-size: 9pt; line-height: 11.4pt; color: #000000; margin-bottom: 0px;"&gt;Cumulative performance: February 1, 2015 through January 31, 2025&lt;/div&gt;  &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; text-align: justify; font-size: 9pt; line-height: 11.4pt; color: #000000; margin-bottom: 0px;"&gt;Initial investment of $10,000&lt;/div&gt;  &lt;div style="margin-top: 5pt; margin-bottom: 5pt;"&gt;
&lt;img alt="Fund Performance - Growth of 10K" src="g936435chartimages_9549738.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 525pt;"/&gt; &lt;/div&gt;  &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify; color: #000000; margin-bottom: 0px;"&gt;See &#x201c;Average annual total returns&#x201d; for additional information on fund performance.&lt;/div&gt; </oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2025_C000118600Member"
      id="t_12_6121dcb6_05fc_f3bc_69de_aea87ab3c6f6"> &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;" title="oef:AvgAnnlRtrTableTextBlock"&gt;Average annual total returns&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; overflow-x: hidden; width: 100%; text-indent: -6pt; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;5 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;10 Years&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; width: auto; font-family: 'Arial'; font-weight: normal; font-style: italic; font-size: 8pt; line-height: 10pt; vertical-align: bottom; white-space: nowrap; color: #000000; border-bottom-color: #000000; border-bottom-style: solid; border-bottom-width: 0.5pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; vertical-align: bottom; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Investor C Shares&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;9.18&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;span style="display: inline; visibility: initial; margin-left: initial;"&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.50&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;span style="display: inline; visibility: initial; margin-left: initial;"&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.37&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;span style="display: inline; visibility: initial; margin-left: initial;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; vertical-align: bottom; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Investor C Shares (with sales charge)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;8.18&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;2.50&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;4.37&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; vertical-align: bottom; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 6pt;"&gt;Russell 1000&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;26.71&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;14.97&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 0 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 0 0;"&gt;13.54&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; text-align: left; color: #000000; overflow-x: hidden; font-family: 'Arial'; width: 100%; vertical-align: bottom; text-indent: -6pt; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 6pt;"&gt;FTSE Nareit All Equity REITs Net Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;10.06&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;2.09&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 6pt 1.6pt 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; width: auto; font-size: 8pt; line-height: 10pt; padding: 2pt 0 1.6pt 0;"&gt;4.09&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; font-family: 'Arial'; color: #000000; text-align: left; white-space: nowrap; width: auto; font-size: 8pt; line-height: 10pt; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_C000118600Member_WithoutSalesLoadMember"
      id="t_16_217ac57b_18fd_8cf1_2002_8e25c82d5971">Investor C Shares</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_C000118600Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_76_0e38e3f8_d6e0_4157_bbf7_97a89867476c"
      unitRef="pure">0.0918</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_C000118600Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_77_5a3e1990_cfc9_4b5a_8a97_8d61eaa46c35"
      unitRef="pure">0.0250</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_C000118600Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_78_44b4e09a_a02a_4165_a85d_54d55f1ede2e"
      unitRef="pure">0.0437</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_C000118600Member"
      id="t_17_225490c6_56fb_88f0_d631_c4d60802f737">Investor C Shares (with sales charge)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_C000118600Member"
      decimals="4"
      id="h_79_11abc130_c898_48f7_9640_c7a937bde833"
      unitRef="pure">0.0818</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_C000118600Member"
      decimals="4"
      id="h_80_dc38920c_fda7_4110_b012_2437022dd072"
      unitRef="pure">0.0250</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_C000118600Member"
      decimals="4"
      id="h_81_665213c0_a874_4fd1_9a1f_183a28c7949f"
      unitRef="pure">0.0437</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_Russell1000IndexMember"
      id="t_21_76ff8c2d_469a_0323_9a96_0568523c9167">Russell 1000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_Russell1000IndexMember"
      decimals="4"
      id="h_82_ecf34ac6_6efa_43da_bd3b_215083ad9c55"
      unitRef="pure">0.2671</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_Russell1000IndexMember"
      decimals="4"
      id="h_83_f92c74bd_af80_4b2c_89a0_30b4d55af5a8"
      unitRef="pure">0.1497</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_Russell1000IndexMember"
      decimals="4"
      id="h_84_5b257d22_9342_4c63_9ac5_8143c0aa0742"
      unitRef="pure">0.1354</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2025_FTSENareitAllEquityREITsNetIndexMember"
      id="t_22_6363dc08_7c6d_9ff5_11ca_ea7cf1b5b680">FTSE Nareit All Equity REITs Net Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2025_FTSENareitAllEquityREITsNetIndexMember"
      decimals="4"
      id="h_85_806ebc0c_8914_4709_bdfb_ade168e4d48b"
      unitRef="pure">0.1006</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2025_FTSENareitAllEquityREITsNetIndexMember"
      decimals="4"
      id="h_86_71fb0b5e_71ae_4284_9718_642d53ab4a52"
      unitRef="pure">0.0209</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2025_FTSENareitAllEquityREITsNetIndexMember"
      decimals="4"
      id="h_87_b21be62c_489e_4b0e_9056_572708b04189"
      unitRef="pure">0.0409</oef:AvgAnnlRtrPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2025_C000118600Member"
      id="t_13_a745d92b_9f8c_09bd_2c7a_b18ff1bfb9c9"> &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;Key Fund statistics&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Net Assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 0 6pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;344,489,738&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Number of Portfolio Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 0 6pt;"&gt;44&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 0 6pt;"&gt;Net Investment Advisory Fees&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 0 6pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;1,797,078&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-size: 8pt; line-height: 10pt; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;Portfolio Turnover Rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; font-family: 'Arial'; color: #000000; font-size: 8pt; line-height: 10pt; width: 12%; vertical-align: bottom; padding: 1.6pt 6pt 1.6pt 6pt;"&gt;59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20250131_C000118600Member"
      decimals="INF"
      id="h_88_50d10961_438b_47ed_926c_b9b53d638b52"
      unitRef="USD">344489738</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20250131_C000118600Member"
      decimals="INF"
      id="h_89_894a52b4_fc27_4ec4_8164_7ac2d4fc964c"
      unitRef="Holding">44</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2025_C000118600Member"
      decimals="INF"
      id="h_90_1a4a0936_9adc_48fb_8455_2348ca0e7f95"
      unitRef="USD">1797078</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2025_C000118600Member"
      decimals="4"
      id="h_91_e0b62ef1_76a4_45cd_9d56_fa0537f5a69a"
      unitRef="pure">0.59</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2025_C000118600Member"
      id="t_18_7c26f9d6_09e6_f07e_099b_69993b584ab0">Past performance is not an indication of future results.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2025_C000118600Member"
      id="t_19_7fe105fc_381d_e21d_7247_149108054031">Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2025_C000118600Member"
      id="t_20_6ee54e3f_f0e3_2d06_6001_840c59648405">Visit &lt;span style="color: #000000; font-weight: bold; text-decoration-line: none; font-family: 'arial'; font-size: 8pt; line-height: 10.4pt; text-align: justify;"&gt;blackrock.com&lt;/span&gt; for more recent performance information.</oef:UpdPerfInfoLocationTextBlock>
    <oef:HoldingsTableTextBlock
      contextRef="FY2025_C000118600Member"
      id="t_14_36522da2_a9d9_2ddd_8507_aa4920363958"> &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-weight: bold; font-size: 10pt; color: #000000; margin-bottom: -0.18pt;"&gt;What did the Fund invest in?&lt;/div&gt;  &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; text-align: justify; font-size: 9pt; line-height: 11.4pt; color: #000000; margin-bottom: 0px;"&gt;(as of January 31, 2025)&lt;/div&gt;  &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;&lt;b&gt;Industry allocation&lt;/b&gt;&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; vertical-align: bottom; text-indent: -6pt; width: auto; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Industry&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Percent of&lt;br/&gt;Net Assets&lt;/em&gt;&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; font-kerning: none; text-align: left; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 6pt;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Specialized REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;37.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Retail REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;14.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Residential REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;13.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Health Care REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;12.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Industrial REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;12.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Office REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;3.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Hotel &amp;amp; Resort REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;2.5&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Diversified REITs&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;1.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Short-Term Securities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;1.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;Other Assets Less Liabilities&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 1.6pt 0;"&gt;0.4&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;   &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;&lt;b&gt;Ten largest holdings&lt;/b&gt;&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Security&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;em&gt;Percent of&lt;br/&gt;Net Assets&lt;/em&gt;&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; font-kerning: none; text-align: left; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Prologis, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;9.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Equinix, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;7.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;American Tower Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;6.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;AvalonBay Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;5.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Welltower, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Simon Property Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Mid-America Apartment Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;SBA Communications Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;VICI Properties, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;3.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;Extra Space Storage, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 1.6pt 0;"&gt;3.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 1.6pt 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;
&lt;table style="border-collapse: collapse; break-inside: avoid-page; width: 100%; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; width: initial; text-indent: 0; color: #000000; padding: 1.6pt 6pt 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(a)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; text-indent: 0; color: #000000; width: 100%; padding: 1.6pt 0 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;For purposes of this report, industry sub-classifications may differ from those utilized&#160;by the Fund for compliance purposes.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; color: #000000; width: initial; vertical-align: top; text-indent: 0; padding: 0 6pt 0 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;&#x200b;&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/div&gt; &lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; font-family: 'Arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; width: 100%; padding: 0;"&gt; &lt;div style="margin-top: 0px; font-kerning: none; font-family: 'arial'; font-style: normal; font-size: 7pt; line-height: 9pt; text-align: justify; vertical-align: top; color: #000000; margin-bottom: 0px; padding: 0px;"&gt;Excludes short-term securities.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="TI20250131_C000118600Member_SpecializedREITsMember"
      decimals="4"
      id="h_92_3049ba55_cd2b_4fa8_8062_3007de6336cd"
      unitRef="pure">0.377</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118600Member_RetailREITsMember"
      decimals="4"
      id="h_93_ef39b152_69b8_4761_ac4f_77c46fbc0eab"
      unitRef="pure">0.146</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118600Member_ResidentialREITsMember"
      decimals="4"
      id="h_94_7a83769a_5164_4f5e_bdcf_dbe57f5c3070"
      unitRef="pure">0.137</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118600Member_HealthCareREITsMember"
      decimals="4"
      id="h_95_cf2e0feb_1c2a_4fb7_baba_191c83167d4d"
      unitRef="pure">0.126</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118600Member_IndustrialREITsMember"
      decimals="4"
      id="h_96_586687f9_d50a_4fc6_b9c7_02bd9bfa26f2"
      unitRef="pure">0.125</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118600Member_OfficeREITsMember"
      decimals="4"
      id="h_97_f58f1014_713b_410e_bdc6_1c8ebd38cf65"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118600Member_HotelAndResortREITsMember"
      decimals="4"
      id="h_98_553fdde6_44f7_4aa7_acb2_f66863a00e3c"
      unitRef="pure">0.025</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118600Member_DiversifiedREITsMember"
      decimals="4"
      id="h_99_b527b0e2_ddbb_4416_923c_b7bdf9df4f2a"
      unitRef="pure">0.014</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118600Member_ShortTermInvestmentsMember"
      decimals="4"
      id="h_100_1258a9e7_a994_4390_b70a_01af30b361a4"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250131_C000118600Member_OtherAssetsLessLiabilitiesMember"
      decimals="4"
      id="h_101_db248e93_3e78_4043_a9c5_f76c966ed92c"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2025_C000118600Member"
      id="t_15_0b0b20ea_4506_b20f_74be_e3b9511487cd"> &lt;div style="border-bottom-width: 0.5pt; border-bottom-style: solid; font-family: 'arial'; font-weight: bold; font-size: 10pt; text-align: left; letter-spacing: normal; text-transform: none; font-kerning: none; color: #000000; background-color: #ffce00; border-bottom-color: #000000; margin-top: 0px; margin-bottom: 0px; padding: 2pt 0px 1.5pt 0px;"&gt;&lt;b&gt;Ten largest holdings&lt;/b&gt;&lt;/div&gt;
&lt;table style="break-inside: avoid-page; table-layout: auto; width: 100%; border-collapse: collapse; margin-top: 0px;"&gt;
&lt;tr style="border-bottom-style: solid; border-bottom-width: 0.5pt; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: italic; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; white-space: nowrap; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;&lt;em&gt;Security&lt;sup style="; font-size: smaller; line-height: 0px;"&gt;(b)&lt;/sup&gt;&lt;/em&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-kerning: none; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;em&gt;Percent of&lt;br/&gt;Net Assets&lt;/em&gt;&lt;/td&gt;
&lt;td style="width: auto; break-inside: avoid-page; font-kerning: none; text-align: left; white-space: nowrap; vertical-align: bottom; padding: 1.6pt 0 0 0;"&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Prologis, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;9.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Equinix, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;7.2&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;American Tower Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;6.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;AvalonBay Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;5.3&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Welltower, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Simon Property Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.6&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;Mid-America Apartment Communities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;SBA Communications Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;4.1&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: initial; border-bottom-style: none; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 0 6pt;"&gt;VICI Properties, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 0 0;"&gt;3.7&lt;/td&gt;
&lt;td style="break-inside: avoid-page; vertical-align: bottom; font-kerning: none; color: #000000; text-align: left; white-space: nowrap; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 1.6pt 0 0 0;"&gt;&lt;span style="visibility: hidden; margin-left: -7pt;"&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width: 0.5pt; border-bottom-style: solid; break-inside: avoid-page; height: auto; font-family: 'arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: #000000;"&gt;
&lt;td style="break-inside: avoid-page; font-kerning: none; color: #000000; overflow-x: hidden; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; font-weight: normal; text-align: left; width: 100%; vertical-align: bottom; text-indent: -6pt; padding: 1.6pt 0 1.6pt 6pt;"&gt;Extra Space Storage, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; vertical-align: bottom; font-kerning: none; color: #000000; width: auto; font-family: 'Arial'; font-style: normal; font-size: 8pt; line-height: 10pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 2pt 0 1.6pt 0;"&gt;3.6&lt;/td&gt;
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