I'm pretty sure it's simply people jumping in thinking they are missing out. It could keep going but I believe most are stepping aside. Let the Algos and retail work it out upside til it works itself out. This isn't sustainable no matter how you look at it.
As long interst rate is so low there is no alternative for big money so we will remain in bull market, whatever the fundamentals it does not matter, money is keep pouring in every month and supply of stock is decreasing. We will see a bear market once we hit 6% on 30 years. It's not worth fighting the trend.
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