How are systematic strategies affecting equities today?

As far as I can tell, many are dead pressure at the moment.

e.g. Here’s a dashboard I whipped up of S&P 500 allocation sensitivity in one popular multi-asset momentum index.

(Definitions 👇)
(Yes, I am bastardizing the greeks here)

Gamma - Change in weight per 1% move in spot price

Vanna - Change in weight per 1% move in realized vol

Charm - Change in weight per 1 day change in historical data window
DlambdaDvol - Change in portfolio leverage required to maintain constant volatility target per 1% change in realized volatility
Note the difference between FEB and OCT. There was so much equity exposure in FEB, changes in spot or realized volatility would lead to meaningful de-risking (not to mention just the burn from charm).

Not quite the same today.
I’m seeing a similar pattern across CTAs, Risk Parity, etc.

That isn’t to say markets can’t go down. Just that an exogenous shock won’t lead to a lot of systematic selling pressure, as far as I measure it.
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