ProShares UltraPro Short S&P500 (SPXU)

[SLCtrader]

Direxion ETFs http://www.direxionshares.com/etfs

for example; TNA/TZA follows Russell1000 US small caps
BGU/BGZ follows Russell 1000 US large caps
FAS/FAZ follows Russell 1000 Financials
TMF/TMV follows 20 Year Plus Treasury