I checked total return price of VTI (which basically reflects the performance of the entire US stock market), and it's up 43.5% from the peak of 2020 (some time in February) to the date of the article. The article seems to be measuring household wealth rather than stocks, so it's plausible that the difference in measurement is off, but "> 50%" and 43.5% is close enough that it's not "extremely misleading".