Alcoa (AA) reports after the close today, and we used the Bespoke Interactive Earnings Report Database to see how the stock typically trades in reaction to its quarterly release. Alcoa is a stock that reports after the close, so we use its price change on the following day to track its one-day reaction.
Looking at Alcoa's last fifteen reports, the stock has averaged an opening gap of 0.70% and then an open to close change of -2.05%. In fact, the stock has traded lower from the open to the close following 12 out of its last 15 earnings reports. In the case of Alcoa, traders typically bid the stock higher in after-hours and pre-market trading and then sell the stock during regular trading hours from 9:30 to the close.