Prior to Alcoa's (NYSE:AA) earnings report on Monday after the close, we highlighted that the stock typically trades down during regular trading hours (9:30AM-4PM) on the first day following its earnings reports.
We noted that this pattern of going down from the open to the close had happened on 12 out of Alcoa's last 15 earnings reports. The action in Alcoa following its earnings report this quarter was no different. As shown in the chart below, the stock opened down 7.62% yesterday, and then went down an additional 3.72% from the open to the close. (Click to enlarge)