The stock market is at highs thanks to Nvidia and AMD, but getting a little stretched. Tesla and Google are on tap.

After a strong rally in smaller company shares, hedge funds are intensifying their short-selling activity, signaling growing uncertainty about the U.S. economy’s ability to withstand ongoing global ...

Before diving in, let's trace Nvidia's path to $4 trillion. Nvidia has seen its market capitalization surge in a short period ...