Every great boom ends. The railroads did. Radio did. The dot-coms did. Someday, the AI buildout will too.

The trouble is that nobody rings a bell at the top. Most investors learn a boom has peaked the hard way — months later, after the gains are gone.

I'd rather not learn it that way. So I built a warning system. I call it the Peak Watch Checklist: 13 specific, trackable signals that have historically flashed before tech booms turn into busts.

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Right now, seven of those 13 signals are lit. That's not a sell signal, but it's no longer a green light, either.…