Given the overall tone of the market since the start of the year, you may be surprised to read that the average stock that has reported earnings this season (which began in early January) has gained about 0.35% on its earnings reaction day (the first trading day after its report).

We keep a huge database of every single earnings report from almost every single U.S. stock from every single earnings season going back to 2001.  (Bespoke Institutional members have full access to the database.)  From this list we can monitor the best and worst performers each earnings season.

Below is a list of the stocks that have gained the most on their earnings reaction days so far this season.  Each of these stocks gained at least 15% on the first trading day following their report.  As shown, TimkenSteel (TMST) has been the biggest winner with a huge gain of 74.95% on its earnings reaction day last Friday.  SunCoke Energy (SXC) ranks second with a gain of 52.61%, followed by Multi-Fineline (MFLX), Boot Barn Holdings (BOOT), Glu Mobile (GLUU), Roadrunner Transportation (RRTS), and Cascade Microtech (CSCD) — which all gained more than 30%.

Five S&P 500 stocks are on the list of earnings season winners — Michael Kors (KORS), Under Armour (UA), CONSOL Energy (CNX), Kinder Morgan (KMI), and Facebook (FB).

While 42 stocks that have reported this season have gained more than 15% on their earnings reaction days, 49 stocks have fallen more than 15%.  These 49 losers are listed below.

Tableau Software (DATA) and LinkedIn (LNKD) both reported last night after the close, and they’re both down huge today — 49.85% for DATA and 39.45% for LNKD.  These two stocks have been the worst performers on their earnings reaction days so far this season.  Four other stocks have fallen more than 30% — Esterline Techs (ESL), OSI Systems (OSIS), YRC Worldwide (YRCW), and Silicon Graphics (SGI).  As you can see, four of the five worst performing stocks on earnings this season reported last night after the close.

Six S&P 500 stocks are on the list of biggest earnings season losers — Ralph Lauren (RL), Alliance Data (ADS), United Rentals (URI), ADT, Juniper (JNPR), and Royal Caribbean (RCL).

For more earnings season analysis, we’ll have a detailed update in our weekly Bespoke Report newsletter due out later today.  Choose one of our three membership options to receive it in your inbox upon publication!