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       <nameOfIssuer>ALON USA ENERGY INC</nameOfIssuer>
       <titleOfClass>COM</titleOfClass>
       <cusip>020520102</cusip>
       <value>2028</value>
       <shrsOrPrnAmt>
           <sshPrnamt>248500</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>137222</Sole>
           <Shared>0</Shared>
           <None>111278</None>
       </votingAuthority>
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   <infoTable>
       <nameOfIssuer>ATLANTICUS HOLDINGS CORP</nameOfIssuer>
       <titleOfClass>COM</titleOfClass>
       <cusip>04914Y102</cusip>
       <value>293</value>
       <shrsOrPrnAmt>
           <sshPrnamt>79300</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>79300</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
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   <infoTable>
       <nameOfIssuer>DELL INC</nameOfIssuer>
       <titleOfClass>COM</titleOfClass>
       <cusip>24702R101</cusip>
       <value>1314</value>
       <shrsOrPrnAmt>
           <sshPrnamt>96000</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>88598</Sole>
           <Shared>0</Shared>
           <None>7402</None>
       </votingAuthority>
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   <infoTable>
       <nameOfIssuer>DRYSHIPS INC</nameOfIssuer>
       <titleOfClass>COM</titleOfClass>
       <cusip>Y2109Q101</cusip>
       <value>305</value>
       <shrsOrPrnAmt>
           <sshPrnamt>100000</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>62683</Sole>
           <Shared>0</Shared>
           <None>37317</None>
       </votingAuthority>
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   <infoTable>
       <nameOfIssuer>INTEL CORP</nameOfIssuer>
       <titleOfClass>COM</titleOfClass>
       <cusip>458140100</cusip>
       <value>1714</value>
       <shrsOrPrnAmt>
           <sshPrnamt>89300</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
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       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>53322</Sole>
           <Shared>0</Shared>
           <None>35978</None>
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   <infoTable>
       <nameOfIssuer>ISHARES MSCI BRAZIL CAPPED IND</nameOfIssuer>
       <titleOfClass>COM</titleOfClass>
       <cusip>464286400</cusip>
       <value>7162</value>
       <shrsOrPrnAmt>
           <sshPrnamt>150000</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
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       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>141200</Sole>
           <Shared>0</Shared>
           <None>8800</None>
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   <infoTable>
       <nameOfIssuer>MOLYCORP INC</nameOfIssuer>
       <titleOfClass>COM</titleOfClass>
       <cusip>608753109</cusip>
       <value>3386</value>
       <shrsOrPrnAmt>
           <sshPrnamt>516100</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
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       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>516100</Sole>
           <Shared>0</Shared>
           <None>0</None>
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   <infoTable>
       <nameOfIssuer>S&amp;P 500 DEPOSITORY RECEIPT</nameOfIssuer>
       <titleOfClass>COM</titleOfClass>
       <cusip>78462F103</cusip>
       <value>19273</value>
       <shrsOrPrnAmt>
           <sshPrnamt>115895</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>103899</Sole>
           <Shared>0</Shared>
           <None>11996</None>
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   <infoTable>
       <nameOfIssuer>ALERE INC 3% 31DEC49 SER B PFD</nameOfIssuer>
       <titleOfClass>CVPFD</titleOfClass>
       <cusip>01449J204</cusip>
       <value>81601</value>
       <shrsOrPrnAmt>
           <sshPrnamt>342793</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>241615</Sole>
           <Shared>0</Shared>
           <None>101178</None>
       </votingAuthority>
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   <infoTable>
       <nameOfIssuer>GEN MOTORS CV SR B 01DEC13</nameOfIssuer>
       <titleOfClass>CVPFD</titleOfClass>
       <cusip>37045V209</cusip>
       <value>9913</value>
       <shrsOrPrnAmt>
           <sshPrnamt>250000</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>136178</Sole>
           <Shared>0</Shared>
           <None>113822</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>WEYERHAEUSER CO 6.375 1JUL16 A</nameOfIssuer>
       <titleOfClass>CVPFD</titleOfClass>
       <cusip>962166872</cusip>
       <value>1044</value>
       <shrsOrPrnAmt>
           <sshPrnamt>25000</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>13600</Sole>
           <Shared>0</Shared>
           <None>11400</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>GENERAL MOTORS-CW15</nameOfIssuer>
       <titleOfClass>RT</titleOfClass>
       <cusip>37045V134</cusip>
       <value>2554</value>
       <shrsOrPrnAmt>
           <sshPrnamt>750000</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>456613</Sole>
           <Shared>0</Shared>
           <None>293387</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>GENERAL MOTORS-CW19</nameOfIssuer>
       <titleOfClass>RT</titleOfClass>
       <cusip>37045V126</cusip>
       <value>7165</value>
       <shrsOrPrnAmt>
           <sshPrnamt>406013</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>306774</Sole>
           <Shared>0</Shared>
           <None>99239</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ALCOA INC 5.25% 15MAR14</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>013817AT8</cusip>
       <value>1225</value>
       <shrsOrPrnAmt>
           <sshPrnamt>1200000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>652000</Sole>
           <Shared>0</Shared>
           <None>548000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ARCHER DANIELS .875% 15FEB14</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>039483AW2</cusip>
       <value>20792</value>
       <shrsOrPrnAmt>
           <sshPrnamt>28543000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>13314000</Sole>
           <Shared>0</Shared>
           <None>15229000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ARRIS GRP CV 2% 15NOV2026</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>04269QAC4</cusip>
       <value>860</value>
       <shrsOrPrnAmt>
           <sshPrnamt>1000000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>554000</Sole>
           <Shared>0</Shared>
           <None>446000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>AVIS BUDGET GROUP INC</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>053774AB1</cusip>
       <value>1446</value>
       <shrsOrPrnAmt>
           <sshPrnamt>1000000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>547000</Sole>
           <Shared>0</Shared>
           <None>453000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>BOTTOMLINE TECH 1.5% 01DEC17</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>101388AA4</cusip>
       <value>1001</value>
       <shrsOrPrnAmt>
           <sshPrnamt>1000000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>633000</Sole>
           <Shared>0</Shared>
           <None>367000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>CACI INTER CV 2.125% 01MAY14</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>127190AD8</cusip>
       <value>5136</value>
       <shrsOrPrnAmt>
           <sshPrnamt>5000000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>2789000</Sole>
           <Shared>0</Shared>
           <None>2211000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>FORESTAR GROUP INC 3.75%1MAR20</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>346232AB7</cusip>
       <value>21627</value>
       <shrsOrPrnAmt>
           <sshPrnamt>21725000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>13531000</Sole>
           <Shared>0</Shared>
           <None>8194000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>INTEGRA LIFESCIE 1.625 15DEC16</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>457985AK5</cusip>
       <value>600</value>
       <shrsOrPrnAmt>
           <sshPrnamt>700000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>423000</Sole>
           <Shared>0</Shared>
           <None>277000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>INTERDIGITAL INC 2.5% 15MAR16</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>458660AB3</cusip>
       <value>285</value>
       <shrsOrPrnAmt>
           <sshPrnamt>300000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>206000</Sole>
           <Shared>0</Shared>
           <None>94000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>L-3 COMMS HLDGS INC 3 1AUG2035</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>502413AW7</cusip>
       <value>5488</value>
       <shrsOrPrnAmt>
           <sshPrnamt>5898000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3625000</Sole>
           <Shared>0</Shared>
           <None>2273000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>LIVE NATION ENT 2.875% 15JUL27</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>538034AB5</cusip>
       <value>4923</value>
       <shrsOrPrnAmt>
           <sshPrnamt>5550000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3512000</Sole>
           <Shared>0</Shared>
           <None>2038000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>MGIC INVESTMENT CO 2% 1APR20</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>552848AE3</cusip>
       <value>5697</value>
       <shrsOrPrnAmt>
           <sshPrnamt>5629000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3075000</Sole>
           <Shared>0</Shared>
           <None>2554000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>MOLYCORP INC 5.5% 1FEB18</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>608753AH2</cusip>
       <value>39341</value>
       <shrsOrPrnAmt>
           <sshPrnamt>41293000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>29963000</Sole>
           <Shared>0</Shared>
           <None>11330000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>OMNICARE INC CV 3.25% 15DEC203</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>681904AL2</cusip>
       <value>8382</value>
       <shrsOrPrnAmt>
           <sshPrnamt>9000000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>5809000</Sole>
           <Shared>0</Shared>
           <None>3191000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>PDL BIO PHARMA 3.75% 01MAY15</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>69329YAC8</cusip>
       <value>24195</value>
       <shrsOrPrnAmt>
           <sshPrnamt>20750000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>14088000</Sole>
           <Shared>0</Shared>
           <None>6662000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>PRICELINE.COM INC 1.25 15MAR15</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>741503AN6</cusip>
       <value>1443</value>
       <shrsOrPrnAmt>
           <sshPrnamt>550000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>296000</Sole>
           <Shared>0</Shared>
           <None>254000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>RADIAN GROUP CV 2.25% 01MAR19</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>750236AN1</cusip>
       <value>3309</value>
       <shrsOrPrnAmt>
           <sshPrnamt>2879000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>1548000</Sole>
           <Shared>0</Shared>
           <None>1331000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>STARWOOD PROPERTY 4% 15JAN19</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>85571BAB1</cusip>
       <value>2674</value>
       <shrsOrPrnAmt>
           <sshPrnamt>3750000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>1652000</Sole>
           <Shared>0</Shared>
           <None>2098000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>STARWOOD PROPERTY 4.55% 1MAR18</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>85571BAA3</cusip>
       <value>3251</value>
       <shrsOrPrnAmt>
           <sshPrnamt>4450000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>2018000</Sole>
           <Shared>0</Shared>
           <None>2432000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>STERLITE INDUSTRIE 4%30OCT14</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>859737AB4</cusip>
       <value>4805</value>
       <shrsOrPrnAmt>
           <sshPrnamt>5448000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3708000</Sole>
           <Shared>0</Shared>
           <None>1740000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SUNPOWER CORP 4.5% 15MAR15</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>867652AE9</cusip>
       <value>10360</value>
       <shrsOrPrnAmt>
           <sshPrnamt>10913000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>5165000</Sole>
           <Shared>0</Shared>
           <None>5748000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SUNPOWER CORP 4.75% 15APR14</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>867652AC3</cusip>
       <value>18318</value>
       <shrsOrPrnAmt>
           <sshPrnamt>20280000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>11032000</Sole>
           <Shared>0</Shared>
           <None>9248000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>TAKE-TWO INTE 1.75% 01DEC16 A</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>874054AC3</cusip>
       <value>89</value>
       <shrsOrPrnAmt>
           <sshPrnamt>108000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>48000</Sole>
           <Shared>0</Shared>
           <None>60000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>TAKE-TWO INTERACTIVE 1% 1JUL18</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>874054AD1</cusip>
       <value>8737</value>
       <shrsOrPrnAmt>
           <sshPrnamt>10750000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>5203000</Sole>
           <Shared>0</Shared>
           <None>5547000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>TIBCO SOFTWARE INC 2.25%1MAY32</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>88632QAB9</cusip>
       <value>6041</value>
       <shrsOrPrnAmt>
           <sshPrnamt>7500000</sshPrnamt>
           <sshPrnamtType>PRN</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>4085000</Sole>
           <Shared>0</Shared>
           <None>3415000</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>VECTOR GROUP FRN 15JUN2026</nameOfIssuer>
       <titleOfClass>SDBCV</titleOfClass>
       <cusip>92240MAL2</cusip>
       <value>21675</value>
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