Just to add some color using real numbers: Berkshire's Q1 cash pile was $397.4 billion, which is nearly 60% of its investable assets.

> SPY not be such a great idea with SpaceX launch upcoming since it will be included into it immediately

S&P has not announced a methodology change yet.

The only reason this happened was due to taxpayers bailing out financial institutions. This only exacerbated an insane amount of moral hazard already present in the market following previous bailouts.

Unfortunately, the US Government continued to run themselves into the ground spending-wise and may have a difficult time with another bailout, unless everyone pretty much agrees that we cannot have a USG failure, so they all pretend like nothing happened.

Eventually the merry-go-round stops, I'm just not sure what the catalyst will be, and it might be 100 years from now.

I am old enough to have had multiple career changes since starting on a major firm’s rates floor in 2008. These IPOs are tiny compared to the overall stock market and the stock market is absolutely tiny compared to debt markets. People consistently underestimate the size of the world economy or even their local economy. The world may look small from an orion capsule near the moon but almost every aspect of human society is bigger than most people can reason about. It is possible these IPOs have an outsized impact on sentiment for weird reasons. But it won’t be an actual outsized impact on capital markets.

Edit: I should add the AI bubble can absolutely burst but there is no reason to believe these IPOs are the end of the ride. If I knew I would be…

Without massive government intervention it probably would have

> things have changed now in a sense that handful of companies are large percentage of the stock market to the point where one has to question why invest in “s&p 500” vs “s&p 25-ish”

A small number of companies have always driven most stock-market gains. Betting on size isn't fundamentally a bad bet. But it is a bet against value and the historical tendency for small companies to be higher risk and higher reward.