<informationTable xmlns="http://www.sec.gov/edgar/document/thirteenf/informationtable" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <infoTable>
       <nameOfIssuer>ISHARES TR</nameOfIssuer>
       <titleOfClass>S&amp;P 100 ETF</titleOfClass>
       <cusip>464287101</cusip>
       <value>3739</value>
       <shrsOrPrnAmt>
           <sshPrnamt>40250</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <otherManager>1</otherManager>
       <votingAuthority>
           <Sole>0</Sole>
           <Shared>40250</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ISHARES TR</nameOfIssuer>
       <titleOfClass>CORE US AGGBD ET</titleOfClass>
       <cusip>464287226</cusip>
       <value>371</value>
       <shrsOrPrnAmt>
           <sshPrnamt>3291</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3291</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ISHARES TR</nameOfIssuer>
       <titleOfClass>IBOXX INV CP ETF</titleOfClass>
       <cusip>464287242</cusip>
       <value>68</value>
       <shrsOrPrnAmt>
           <sshPrnamt>557</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>557</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ISHARES TR</nameOfIssuer>
       <titleOfClass>7-10 Y TR BD ETF</titleOfClass>
       <cusip>464287440</cusip>
       <value>67</value>
       <shrsOrPrnAmt>
           <sshPrnamt>595</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>595</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ISHARES TR</nameOfIssuer>
       <titleOfClass>IBOXX HI YD ETF</titleOfClass>
       <cusip>464288513</cusip>
       <value>169</value>
       <shrsOrPrnAmt>
           <sshPrnamt>1992</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>1992</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>POWERSHARES ETF TR II</nameOfIssuer>
       <titleOfClass>S&amp;P500 LOW VOL</titleOfClass>
       <cusip>73937B779</cusip>
       <value>55406</value>
       <shrsOrPrnAmt>
           <sshPrnamt>1295133</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <otherManager>1</otherManager>
       <votingAuthority>
           <Sole>0</Sole>
           <Shared>1295133</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>POWERSHARES ETF TR II</nameOfIssuer>
       <titleOfClass>S&amp;P500 LOW VOL</titleOfClass>
       <cusip>73937B779</cusip>
       <value>946</value>
       <shrsOrPrnAmt>
           <sshPrnamt>22119</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>22119</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
       <titleOfClass>SBI MATERIALS</titleOfClass>
       <cusip>81369Y100</cusip>
       <value>12421</value>
       <shrsOrPrnAmt>
           <sshPrnamt>268041</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <otherManager>1</otherManager>
       <votingAuthority>
           <Sole>0</Sole>
           <Shared>268041</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
       <titleOfClass>SBI HEALTHCARE</titleOfClass>
       <cusip>81369Y209</cusip>
       <value>12767</value>
       <shrsOrPrnAmt>
           <sshPrnamt>178042</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <otherManager>1</otherManager>
       <votingAuthority>
           <Sole>0</Sole>
           <Shared>178042</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
       <titleOfClass>SBI CONS STPLS</titleOfClass>
       <cusip>81369Y308</cusip>
       <value>12655</value>
       <shrsOrPrnAmt>
           <sshPrnamt>229466</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <otherManager>1</otherManager>
       <votingAuthority>
           <Sole>0</Sole>
           <Shared>229466</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
       <titleOfClass>SBI INT-ENERGY</titleOfClass>
       <cusip>81369Y506</cusip>
       <value>12838</value>
       <shrsOrPrnAmt>
           <sshPrnamt>188134</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <otherManager>1</otherManager>
       <votingAuthority>
           <Sole>0</Sole>
           <Shared>188134</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
       <titleOfClass>SBI INT-UTILS</titleOfClass>
       <cusip>81369Y886</cusip>
       <value>13097</value>
       <shrsOrPrnAmt>
           <sshPrnamt>249606</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <otherManager>1</otherManager>
       <votingAuthority>
           <Sole>0</Sole>
           <Shared>249606</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
       <titleOfClass>SBI MATERIALS</titleOfClass>
       <cusip>81369Y100</cusip>
       <value>217</value>
       <shrsOrPrnAmt>
           <sshPrnamt>4697</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>4697</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
       <titleOfClass>SBI HEALTHCARE</titleOfClass>
       <cusip>81369Y209</cusip>
       <value>219</value>
       <shrsOrPrnAmt>
           <sshPrnamt>3053</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3053</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
       <titleOfClass>SBI CONS STPLS</titleOfClass>
       <cusip>81369Y308</cusip>
       <value>217</value>
       <shrsOrPrnAmt>
           <sshPrnamt>3926</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3926</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
       <titleOfClass>SBI INT-ENERGY</titleOfClass>
       <cusip>81369Y506</cusip>
       <value>224</value>
       <shrsOrPrnAmt>
           <sshPrnamt>3283</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3283</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
       <titleOfClass>SBI INT-UTILS</titleOfClass>
       <cusip>81369Y886</cusip>
       <value>225</value>
       <shrsOrPrnAmt>
           <sshPrnamt>4287</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>4287</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>VANGUARD INDEX FDS</nameOfIssuer>
       <titleOfClass>S&amp;P 500 ETF SHS</titleOfClass>
       <cusip>922908363</cusip>
       <value>36902</value>
       <shrsOrPrnAmt>
           <sshPrnamt>191996</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <otherManager>1</otherManager>
       <votingAuthority>
           <Sole>0</Sole>
           <Shared>191996</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>VANGUARD INDEX FDS</nameOfIssuer>
       <titleOfClass>S&amp;P 500 ETF SHS</titleOfClass>
       <cusip>922908363</cusip>
       <value>626</value>
       <shrsOrPrnAmt>
           <sshPrnamt>3257</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3257</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
</informationTable>
