Inverse ETF's

With the market in a correction, consider looking at some of the inverse ETF's listed below.

DXD- Ultrashort Dow 30 Proshares. Corresponds to twice the daily inverse of the Dow 30.

QID- Proshares Ultrashort QQQ. Corresponds to twice the daily inverse of the Nasdaq 100.

SDS- Ultrashort S&P 500 proshares. Corresponds to twice (200 %) the daily inverse of the S&P 500.