Animal spirits are raging again among retail investors and topping the meme frenzy seen exactly two years ago — at least by one measure. Unbowed by losses of more than 50% in their favorite stocks last year, individual traders are storming back to stocks like Carvana Co. and crypto-related products as the market staged a rebound that added almost $2 trillion to equity values in January alone. With professional investors mostly staying on the sidelines, the foray is boosting retail's market presence. Trading orders from the retail army in stocks and exchange-traded funds accounted for 23% of the market's total volume in late January, above the previous high of 22% reached during the 2021 meme mania, according to JPMorgan Chase