I will only give the stock symbol, get the details from Yahoo finance or Google finance.
Short Index: SDOW, SQQQ, SRTY, SPXU, QID, SJF, SJH
Short Sector: SMDD, SJL, SSG, SDD, SDP
Short Finance: FAZ, SEF, SKF
Short O&G: ERY, DTO, SCO, DUG
Please note that some are mimicking x2 or x3 times the underlying index/sector, this means that the gain or loss will be magnified. If you got the timing wrong, it will completely wreck your financial status.
For me, the inverste ETF/ETN has not fulfill my buy signal. This means the index has not shown any sell signal. It could take another 6 months to get one. So wait and observe.