Retail investors had a poor year in 2022, with the average portfolio ending the year down around 35% from all-time highs, Vanda Research previously estimated.
However, retail investors have shown renewed interest in the early part of 2023.
Meanwhile, shares of early meme stocks GameStop (GME.N) and AMC Entertainment (AMC.N) have pared some losses after last year's tumble.
"Investor enthusiasm is also attracting short-sellers that are skeptical about some of the resulting valuations," said Evan Niu, an analyst at Ortex, which tracks real-time short interest data.
AI software firm Veritone (VERI.O), SoundHound and BigBear.ai also show a pick up in short interest, Ortex data showed.