RYDEX SERIES FDS LONG SHORT COMMODITIES MUTUAL FUNDS USMF - What does RYDEX SERIES FDS LONG SHORT COMMODITIES MUTUAL FUNDS USMF mean? - What does RYDEX SERIES FDS LONG SHORT COMMODITIES MUTUAL FUNDS USMF stand for? - RYDEX SERIES FDS LONG SHORT COMMODITIES MUTUAL FUNDS USMF meaning