ETFs that return 300% of the S&P 500 daily performance have started trading.

The UltraPro S&P 500 (UPRO) and the UltraPro Short S&P 500 (SPXU), both from ProFunds, are the first ETFs designed to seek triple exposure to the S&P 500 on a daily basis.

ProFunds Group is the world’s largest manager of short and leveraged funds.

See the ProShares ETF Directory for more.