This took off like, well, a bat out of hell.

Bats Global Markets, the scandal-and error-plagued stock exchange and “dark pool” operator, successfully debuted its initial public offering on Friday — popping 21 percent to $23 at the end of trading day.

The IPO was the second attempt for Bats to sell shares in the broader market, after a glitch derailed its first attempt at going public in 2012.