While the average stock that has reported earnings this season has gone down 0.82% on its earnings reaction day, there have of course been some big winners.  There are 27 stocks in the S&P 500 that have gained 5% or more on their earnings reaction days so far this season (which began on July 10th).  These 27 stocks are listed in the table below.

As shown, Michael Kors (KORS) tops the list with a one-day gain of 21.54% that it saw on August 8th after earnings.  Perrigo (PRGO) ranks 2nd with a gain of 15.78%, followed by Illumina (ILMN), Freeport-McMoRan (FCX), and Netflix (NFLX).  Other notables on the list of earnings season winners include Boeing (BA), Verizon (VZ), Caterpillar (CAT), and AT&T (T).

One more thing — while these stocks saw huge gains on their earnings reaction days, they’ve on average declined by 2.28% since then.  This means there hasn’t been much upside follow-through for the stocks that initially reacted the most positively to earnings.

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While there have been 27 S&P 500 stocks that have gained 5% or more on their earnings reaction days this season, there have been a lot more than have fallen 5% or more.  Sixty-two in fact.

Below is a list of this season’s biggest losers in the S&P 500.  Seagate Tech (STX) ranks at the top with a one-day drop of 16.5%, followed by Akamai (AKAM), Viacom (VIAB), and Interpublic (IPG).  Other notables on the list of earnings season losers include Macy’s (M), Starbucks (SBUX), Under Armour (UAA), and Johnson Controls (JCI).

Above we pointed out that the biggest earnings season winners have seen no upside follow-through after their initial jumps.  The biggest losers also haven’t seen any kind of bounce since their big drops.  On average, the stocks below have fallen another 3.13% since the close on their earnings reaction days.

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