Wall Street is suddenly fixated on valuations again, with the Shiller CAPE—an inflation-adjusted, 10-year earnings metric—at the center of renewed caution across investor conversations.

The next time you're tempted to buy the latest hot asset that's seemingly making everybody rich, consider this quote from Warren Buffett.

Those millions of dead people supposedly claiming Social Security? It’s obvious now that they were bogus.

This AI ‘frenzy’ is starting to spook investors ...