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EXCEL - IDEA: XBRL DOCUMENT - FactorShares 2X: S&P500 Bull/TBond BearFinancial_Report.xls
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EX-31.1 - CERTIFICATION - FactorShares 2X: S&P500 Bull/TBond Beare47769ex31-1.htm
EX-31.2 - CERTIFICATION - FactorShares 2X: S&P500 Bull/TBond Beare47769ex31-2.htm
EX-32.1 - CERTIFICATION - FactorShares 2X: S&P500 Bull/TBond Beare47769ex32-1.htm
EX-32.2 - CERTIFICATION - FactorShares 2X: S&P500 Bull/TBond Beare47769ex32-2.htm
10-K - FORM 10-K - FactorShares 2X: S&P500 Bull/TBond Beare47769-10k.htm
XML - IDEA: XBRL DOCUMENT - FactorShares 2X: S&P500 Bull/TBond BearR2.htm
v2.4.0.6
Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2011
Mar. 22, 2012
Jun. 30, 2011
Document And Entity Information Abstract      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2011    
Entity Registrant Name FactorShares 2X: S&P500 Bull/TBond Bear    
Entity Central Index Key 0001482875    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2011    
Document Fiscal Period Focus FY    
Entity Filer Category Smaller Reporting Company    
Entity Common Stock, Shares Outstanding   100,040  
Entity Current Reporting Status Yes    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Public Float     $ 2,280,000