AI stocks are booming, valuations are stretched, and capital spending is surging. Does that add up to a bubble—or just another story investors cannot reliably time? Tom and Don walk through Fidelity’s warning signs without pretending anyone can ring a bell at the top. The practical conclusion is less exciting and more useful: stay diversified, keep realistic expectations, include the fixed income your plan needs, and do not mistake a recent gain for money the market owes you forever. Then a...