ProShares UltraPro Short Russell2000(AMEX:SRTY)

SRTY provides an aggressive, one-day bet against the Russell 2000's index of 2,000 small-cap US firms. The fund will track -3x the returns of the underlying index and it may use both ETF and index swaps to achieve its inverse exposure. As with most leveraged and inverse products, SRTY is designed to provide its -3x exposure for one trading day, and anyone holding it for longer than a day will be exposed to the effects of compounding, which cause returns to drift away from the expected inverse exposure to the index. Investors should therefore plan to hold SRTY for no longer than one day, and if they do hold it for longer, they will need to adjust their investment on a daily basis.