The S&P 500 — a key guide to many savings plans — is up 22% in a year, more than twice the return it averages over time. There's a conviction all of this AI means profits, profits and more profits. Add to that a surge in speculation driven by internet chatter, and it raises the question: Should we worry the stock market is about to bubble over? We ask veteran investor Barry Ritholtz, chairman and chief investment officer at Ritholtz Wealth Management in New York. Plus, hundreds of thousands of refugees are returning to Syria after the fall of the country's dictator last year. And many of those returning are bringing their businesses back with them.