Around 200 companies have reported earnings since the Q1 2019 reporting period began a couple of weeks ago. So far, the average stock that has reported earnings has gained 0.21% on its earnings reaction day. (For companies that report before the open, their earnings reaction day is that same trading day. For companies that report after the close, their earnings reaction day is the following trading day).

We monitor stock price reactions to earnings reports because that basically tells an investor how good or bad the report was. You don’t have to look further than stock price reaction to know how well received the company’s quarterly numbers were.

During the current earnings season, Twitter (TWTR) has thus far had the most positive response to earnings with its one-day gain of 15.64% yesterday. As shown in the snapshot from our Earnings Explorer below, TWTR beat EPS estimates by 22 cents ($0.37 vs. estimates of $0.15).TWTR also beat sales estimates by $11.8 million.

TWTR initially gapped up 7.39% when it opened for trading yesterday, but investors continued to rush into the stock all day as it went up another 7.69% from the open to the close. By the close, the stock was up $5.38/share.

Other notables on the list of biggest earnings season winners so far this season include Hasbro (HAS) with a gain of 14.23%, Acuity Brands (AYI) at +8.8%, and Constellation Brands (STZ) at +6.54%.

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Of course, there have been some losers as well this earnings season. Astec Industries (ASTE) currently ranks as the worst performer on earnings with a one-day decline of 26% yesterday. Insteel Industries (IIIN) is the only other stock that has fallen more than 20%. Other notables on the list of losers include Skechers (SKX), Check Point Software (CHKP), and Intuitive Surgical (ISRG).

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