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DEPOSITS WITH FUTURES BROKERS	12 Months Ended
DEPOSITS WITH FUTURES BROKERS	Dec. 31, 2018
DEPOSITS WITH FUTURES BROKERS [Abstract]
DEPOSITS WITH FUTURES BROKERS	Note 5. DEPOSITS WITH FUTURES BROKERS The Fund deposits assets with UBS Securities LLC and Goldman, Sachs & Co. subject to Commodity Futures Trading Commission regulations and various exchange and futures broker requirements. Margin requirements are satisfied by the deposit of U.S. Treasury Bills and cash with such futures brokers. The Fund typically earns interest income on its assets deposited with the futures brokers.