Volatile equity markets were a boon for Robinhood Markets Inc., which on Wednesday reported a 45% jump in year-over-year revenue and a profit that more than doubled compared to a year ago.

Albemarle topped analyst expectations with a narrower second-quarter loss and higher sales. The stock gained 7% to $73.35 after the market closed Wednesday.

Dow Jones futures rose overnight, along with S&P 500 futures and especially Nasdaq futures, after the stock market closed ...