The bull market has entered its manic phase. This is now the consensus framing, repeated across research desks and newsletter copy with equal confidence, and it is broadly correct. It is also, on its own, almost useless. A market state is not a calendar. The word manic describes how the market is behaving, not when it will stop.
Distinguish the two questions the headline collapses into one. Whether the market is overextended is a question about the present, and the evidence is unambiguous. Whether it crashes soon is a question about the future, and the same evidence is close to silent. Confusing the first answer for the second is how investors talk themselves out of a year of gains, or into one.
What is actually manic
The leverage is. Outstanding margin debt has risen roughly 53 percent over the past year. That is the build that precedes violent unwinds, because leverage is the mechanism through which an ordinary selloff becomes a cascade. When leveraged holders cannot post collateral, they sell whatever is liquid, which forces the next holder to do the same. The 53 percent figure does not tell you the cascade is imminent. It tells you that when one starts, it will not be orderly.
The concentration is. S&P 500 companies repurchased more than a trillion dollars of their own stock in 2025, and the index’s gains have been carried by a narrow band of names tied to a single capital-spending thesis. The AI build-out has the structural features of a bubble: faith-based monetization timelines, capex outrunning visible revenue, and a supply chain priced as though the spending curve only goes up. The comparison the sophisticated bears keep drawing is not to the dot-com crash but to the year before it, which is precisely the comparison that lets them stay long while sounding cautious.
What is not manic
The crowd. A genuine mania runs on broad participation and euphoria. This one does not have it. Consumer sentiment sits below where it stood in the depths of the financial crisis. That is not the psychology of a blow-off top; it is a narrow, leveraged advance carried by professionals while the public stays sour. The divergence matters more than either half of it. Manic leverage layered over depressed sentiment is not the signature of a market about to peak on exhaustion. It is the signature of a late-cycle market that can grind higher precisely because the euphoria has not yet arrived to be exhausted.
This is the detail the crash narrative omits. The melt-up thesis, taken seriously, is a bullish argument first. It says the most violent gains come last, after valuation discipline is abandoned, and that the leverage which guarantees a brutal exit also fuels the final ascent. Whoever called this market manic in the spring has, so far, been right and early. Being right and early is indistinguishable from being wrong until the trigger arrives.
The trigger is the only thing that matters, and it cannot be forecast
Markets do not fall because they are expensive. They fall when something in the financial plumbing breaks. The candidates are knowable even though their timing is not. A hawkish surprise from a Federal Reserve about to change leadership, with midterm fiscal stimulus raising the inflation that forces the pivot. A funding or credit event that turns leveraged length into forced selling. A growth scare that breaks the AI capex thesis on a single earnings call, re-rating the entire supply chain at once. Each is plausible. None is dateable. The honest position is that valuation and leverage set the depth of the eventual fall while saying nothing about its date, and anyone selling a precise date is selling a subscription.
So the manic label answers the wrong question. It widens the distribution of outcomes — more upside still on the table, a fatter and more sudden left tail when it turns — without raising the probability that the turn is next. Treating a state as a forecast is the specific error the framing invites.
The useful question is not whether the crash is coming. It is whether you survive the violence whenever it arrives without being made a forced seller at the bottom. That is a question about leverage, liquidity, and position size, all of which you control, rather than about a top, which you do not. The manic phase is real. Your margin balance is the only part of it you get a vote on.