The Correlation isn’t the cause of the problem, it’s a symptom. This is a liquidity-driven market. In a liquidity-driven market, the Dollar functions as the global pressure valve. Adding Trillions in liquidity to the system, the Dollar falls, and money is driven into risk assets. As liquidity recedes at the margin (which is happening for a while now), the Dollar begins to chop sideways or even rally sharply, and Equities suffer.

https://macrocharts.blog/2020/10/12/halfway-there-and-back-again-thoughts-on-year-end-and-2021/

Its all about the dollar, and politics plays into this DIRECTLY.