January Effect: What It Is in the Stock Market, Possible Causes

Описание: The January Effect is a perceived seasonal increase in stock prices during the month of January. This market anomaly has been attributed to an increase in buying following the December sell-off due to tax-loss harvesting and investors using year-end cash bonuses to purchase investments. However, the January Effect has largely disappeared as its presence became widely known. While it is theorized to occur due to tax-loss harvesting and year-end cash bonuses, its evidence is tenuous, with only a 57%/43% split between winning and losing January months over the past 30 years.
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