There is generally no point in doing this, keep a constant asset allocation that match your risk appetite, otherwise you're just playing the casino.
The problem is that this recent equities run has been extra terrible for more conservative 60/40 portfolios [0].
[0] https://www.morningstar.com/economy/6040-portfolio-150-year-...
There's an intermediate option: sell high P/E stocks and buy lower P/E stocks with dividend paying history. There are ETFs designed for this purpose too.
In particular bulking up in EM, EU, and small cap. And slimming down in us large cap.
That's crazy.
I have a blog post about the inverse TSLA position here: https://bagelpour.wordpress.com/2025/11/30/taking-an-inverse...