Cash Management Agreement with Affiliate	6 Months Ended
Cash Management Agreement with Affiliate	Jun. 30, 2013
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	(10) Cash Management Agreement with Affiliate On October 6, 2010, the Managing Owner retained RJOIM, an SEC-registered investment adviser and an affiliate of the Managing Owner, to serve as the Trust’s cash manager. The assets managed by RJOIM are held in segregated accounts in custody at Wells. RJOIM is paid an annual fee, currently 0.20%, calculated and accrued daily at a rate equal to 1/360 of the principal balance of the Trust’s deposits held by RJOIM. As of June 30, 2013, such deposits consisted of $3,763,722 in cash and $11,775,841 in fixed income securities. Aggregate advisory fees earned by RJOIM totaled $8,513 and $17,437 for the three and six months ended June 30, 2013, respectively.

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

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