Retail investors are largely behind the stock market reaching new records, buying $50 billion in stocks in the last month alone, Barclays estimated.

Shares of Kohl’s Corp briefly doubled in value on Tuesday, as retail traders piled into the U.S. department store chain’s stocks and options, making it one of the most actively traded stocks on retail trading platforms.

Kohl’s stock was up 35% at $14.05 in late morning, after trading resumed. There’s a good chance the retailer just became the latest meme stock. With just under 50% of the company’s stock float sold short,