Investors have grown more concerned over the run-up in tech stocks and valuations of private AI companies, stoking fears of a bubble. WSJ’s Hannah Erin Lang uses three charts to explain what’s behind ...

Remember when the very first iPhone came out in 2007 and it was the latest in cutting-edge tech? Those were the days. The days of the iPhone 1. Adjusted for inflation, the first-generation iPhone ...

Several years ago, I bought a smartphone and soon came to love it. Being able to send an e-mail, look up a fact, or buy something no matter where I was meant a previously unimaginable gain in ...