Investopedia's Caleb Silver offers insight into the biggest stocks traders have been buying and selling amid the recent market rebound. The top buys he's seen involve Big Tech names recapturing former glory, like Nvidia (NVDA), Microsoft (MSFT), and Micron (MU). He explains why they fell out of favor and why investors are moving back into them. Caleb shows that while a majority of investors are at least cautiously optimistic, there's still plenty who are skeptical of the recent run in stocks.