Artful Dodger
"Neko no me"
Would be interesting to compare put volume to shorting. Of course because of delta hedging they need to sell stock if they SP falls. Didn’t happen today.
FINRA doesn't track or report on derivatives, so I have no data source to do such a comparison ( paging @FrankSG ). Options are real-time data w/o archives, whereas FINRA washes out intraday time stamps, releasing only a single daily volume summary.
So only a statistical approach in theory could be able to tease out relationships. But they'd be correlations after many such events, not proof of a single event since FINRA also strips out the identities of short exempt traders.
In summary, at best we're given a glimpse at the shadow of movement behind a curtain, but the smell is noticable...
Regards,
Lodger