Stock traders talk about the “January effect” and the “January barometer.” The January effect is actually a confluence of three effects. A year ago, the market acted as if it had never heard of the January effect. The market fell. The market fell a little in January, and plunged in February and March as the pandemic worsened. Even without the three energy names, however, this basket of 2020 losers had gained about 6%.

Source: Forbes January 25, 2021 15:33 UTC