Easiest shorts in the market, all you need to do to profit
is to short them on a -200 pt day like today. These etf's even go down when the market is down modestly like -20 to -50 pt, for these ETF's to go up the market needs to go down triple digits or more.
Notice that even in the downtrend between April 29 to June 22 these etf's still managed to go down even though they are supposed to go up on such a trend. You can see why they go down big on up days in the market.