I just came across an interview where Paul Tudor Jones is warning again about a major market breakout. The guy has a pretty solid track record when it comes to scenarios like that.

What caught my interest: Jones actually compares the current situation to the Internet bubble of 1999. His point is that the combination of aggressive fiscal and monetary measures—here we’re talking about a budget deficit of 6% and potential rate cuts—acts like a catalyst. That could lead to a massive economic upturn, he says.

What’s interesting about Paul Tudor Jones’ analysis is less the warning itself, but the implication: if these conditions really lead to a rapid surge in the market, then traders and investors should be able to react damn fast. Jones emphasizes that you have to be ready to exit immediately if the signals are right.

I find this very insightful, because Paul Tudor Jones isn’t just pessimistic—he sees a real scenario with massive upside potential, but also with the corresponding risks. The parallel to 1999 is the warning sign here: back then it also shot up quickly, and then the crash came.

Anyone who’s watching the markets should take warnings like this from investors such as Paul Tudor Jones seriously. This isn’t just anybody talking.