Hi, I just joined and this is my first post . I recently started trading just a couple weeks ago, and on Tuesday I tried out trading SDS which is the SPY double short. However my broker (thinkorswim) took away extra buying power so that I ended up gaining no leverage at all compared to shorting the SPY directly. When I inquired about it, their explanation was that since, as a day trader, I am receiving 4 to 1 margin benefit, they will not allow any additional leverage created by these funds. Is this fair and/or the standard policy of online brokers? I can see their point but at the same time if they all take this stance, then there seems to be no reason for these ETFs to even exist.