SIMT HIGH YIELD BOND FUND (First Prospectus Summary) | SIMT HIGH YIELD BOND FUND

HIGH YIELD BOND FUND

Investment Goal

Total return.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold
Fund shares.

SHAREHOLDER FEES (fees paid directly from your investment)

Shareholder Fees	SIMT HIGH YIELD BOND FUND Class A
Redemption Fee (applies to a redemption, or series of redemptions, from a single identifiable source that, in the aggregate, exceeds $25 million within any thirty (30) day period)	1.00%

ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		SIMT HIGH YIELD BOND FUND Class A
Management Fees		0.49%
Distribution (12b-1) Fees		none
Other Expenses		0.65%
Total Annual Fund Operating Expenses	[1]	1.14%

EXAMPLE

This Example is intended to help you compare the cost of investing in the Fund
with the cost of investing in other mutual funds. The Example assumes that you
invest $10,000 in the Fund for the time periods indicated and then redeem all of
your shares at the end of those periods. The Example also assumes that your
investment has a 5% return each year and that the Fund's operating expenses
remain the same.

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	Expense Example, With Redemption, 1 Year	Expense Example, With Redemption, 3 Years	Expense Example, With Redemption, 5 Years	Expense Example, With Redemption, 10 Years
SIMT HIGH YIELD BOND FUND Class A	116	362	628	1,386

PORTFOLIO TURNOVER

The Fund pays transaction costs, such as commissions, when it buys and sells
securities (or "turns over" its portfolio). A higher portfolio turnover rate may
indicate higher transaction costs and may result in higher taxes when Fund
shares are held in a taxable account. These costs, which are not reflected in
annual Fund operating expenses or in the Example, affect the Fund's performance.
During the most recent fiscal year, the Fund's portfolio turnover rate was 82%
of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the High Yield Bond Fund will invest at least 80% of
its net assets (plus the amount of any borrowings for investment purposes) in
high yield fixed income securities. The Fund will invest primarily in fixed
income securities rated below investment grade (junk bonds), including corporate
bonds and debentures, convertible and preferred securities, zero coupon
obligations and collateralized debt obligations (CDOs) and collateralized loan
obligations (CLOs).

The Fund uses a multi-manager approach, relying on a number of Sub-Advisers with
differing investment philosophies to manage portions of the Fund's portfolio
under the general supervision of SIMC. To a limited extent, SIMC may also
directly manage a portion of the Fund's portfolio. In managing the Fund's
assets, the Sub-Advisers and, to the extent applicable, SIMC, seek to select
securities that offer a high current yield as well as total return potential.
The Fund's securities seek to be diversified as to issuers and industries. The
Fund's average weighted maturity may vary and will generally not exceed ten
years. There is no limit on the maturity or credit quality of any security.

The Fund will invest primarily in securities rated BB, B, CCC, CC, C and D.
However, it may also invest in non-rated securities or securities rated
investment grade (AAA, AA, A and BBB). The Fund may also invest in ETFs to gain
exposure to a particular portion of the market while awaiting an opportunity to
purchase securities directly. The Fund may also invest a portion of its assets
in bank loans, which are, generally, non-investment grade (junk) floating rate
instruments. The Fund may invest in bank loans in the form of participations in
the loans (participations) and assignments of all or a portion of the loans from
third parties (assignments).

Principal Risks

Bank Loans Risk - With respect to bank loans, the Fund will assume the credit
risk of both the borrower of the loan and the lender that is selling the
participation in the loan. The Fund may also have difficulty disposing of bank
loans because, in certain cases, the market for such instruments is not highly
liquid.

Below Investment Grade Securities Risk - Fixed income securities rated below
investment grade (junk bonds) involve greater risks of default or downgrade and
are more volatile than investment grade securities because the prospect for
repayment of principal and interest of many of these securities is speculative.

CDOs and CLOs Risk - CDOs and CLOs are securities backed by an underlying
portfolio of debt and loan obligations, respectively. CDOs and CLOs issue
classes or "tranches" that vary in risk and yield and may experience substantial
losses due to actual defaults, decrease of market value due to collateral
defaults and removal of subordinate tranches, market anticipation of defaults
and investor aversion to CDO and CLO securities as a class. The risks of
investing in CDOs and CLOs depend largely on the tranche invested in and the
type of the underlying debts and loans in the tranche of the CDO or CLO,
respectively, in which the Fund invests. CDOs and CLOs also carry risks
including, but not limited to, interest rate risk and credit risk, which are
described below.

Convertible and Preferred Securities Risk - Convertible and preferred securities
have many of the same characteristics as stocks, including many of the same
risks. In addition, convertible securities may be more sensitive to changes in
interest rates than stocks. Convertible securities may also have credit ratings
below investment grade, meaning that they carry a higher risk of failure by the
issuer to pay principal and/or interest when due.
  
Corporate Fixed Income Securities Risk - Corporate fixed income securities
respond to economic developments, especially changes in interest rates, as well
as perceptions of the creditworthiness and business prospects of individual
issuers.

Credit Risk - The risk that the issuer of a security or the counterparty to a
contract will default or otherwise become unable to honor a financial
obligation.

Exchange-Traded Funds (ETFs) Risk - The risks of owning shares of an ETF
generally reflect the risks of owning the underlying securities the ETF is
designed to track, although lack of liquidity in an ETF could result in its
value being more volatile than the underlying portfolio securities.

Extension Risk - The risk that rising interest rates may extend the duration of
a fixed income security, typically reducing the security's value.

Fixed Income Market Risk - The prices of the Fund's fixed income securities
respond to economic developments, particularly interest rate changes, as well as
to perceptions about the creditworthiness of individual issuers, including
governments and their agencies. In the case of foreign securities, price
fluctuations will reflect international economic and political events, as well
as changes in currency valuations relative to the U.S. dollar.

Interest Rate Risk - The risk that the value of fixed income securities,
including U.S. Government securities, will fall due to rising interest rates.

Investment Style Risk - The risk that high yield securities may underperform
other segments of the fixed income markets or the fixed income markets as a
whole.

Liquidity Risk - The risk that certain securities may be difficult or impossible
to sell at the time and the price that the Fund would like. The Fund may have to
lower the price, sell other securities instead or forego an investment
opportunity, any of which could have a negative effect on Fund management or
performance.

Prepayment Risk - The risk that, with declining interest rates, fixed income
securities with stated interest rates may have the principal paid earlier than
expected, requiring the Fund to invest the proceeds at generally lower interest
rates.

Loss of money is a risk of investing in the Fund.

Performance Information

The bar chart and the performance table below provide some indication of the
risks of investing in the Fund by showing changes in the Fund's performance from
year to year for the past ten calendar years and by showing how the Fund's
average annual returns for 1, 5 and 10 years, and since the Fund's inception,
compared with those of a broad measure of market performance. The Fund's past
performance (before and after taxes) is not necessarily an indication of how the
Fund will perform in the future. For current performance information, please
call 1-800-DIAL-SEI.

Best Quarter: 22.11% (06/30/09)
Worst Quarter: -21.94% (12/31/08)

Average Annual Total Returns (for the periods ended December 31, 2011)

After-tax returns are calculated using the historical highest individual federal
marginal income tax rates and do not reflect the impact of state and local
taxes. Your actual after-tax returns will depend on your tax situation and may
differ from those shown. After-tax returns shown are not relevant to investors
who hold their Fund shares through tax-deferred arrangements, such as 401(k)
plans or individual retirement accounts.

Average Annual Total Returns SIMT HIGH YIELD BOND FUND	Average Annual Returns, Label	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Since Inception		Average Annual Returns, Inception Date
Class A	Class A Return Before Taxes	4.26%	5.98%	7.62%	7.36%		Jan. 11, 1995
Class A After Taxes on Distributions	Class A Return After Taxes on Distributions	1.52%	2.56%	4.37%	3.80%		Jan. 11, 1995
Class A After Taxes on Distributions and Sales	Class A Return After Taxes on Distributions and Sale of Fund Shares	2.76%	2.98%	4.54%	4.04%		Jan. 11, 1995
BofA Merrill Lynch U.S. High Yield Constrained Index Return	BofA Merrill Lynch U.S. High Yield Constrained Index Return (reflects no deduction for fees, expenses or taxes)	4.37%	7.54%	8.74%		[1]

[1] Because the Fund incurred AFFE during the most recent fiscal year, the operating expenses in this fee table will not correlate to the expense ratio in the Fund's financial statements (or the "Financial Highlights" section in the prospectus) because the financial statements include only the direct operating expenses incurred by the Fund, not the indirect costs of investing in other investment companies.

[1] The BofA Merrill Lynch U.S. High Yield Constrained Index Return for the "Since Inception" period is not provided since returns for the index are not available prior to 1996.