Does volume cause vol or does vol cause volume?
Good question. But the question is better like "what is the correlation between volume and volatility?". I wonder someone has some statistics.Does volume cause vol or does vol cause volume?

I know it's Friday, but this one seems a collective miss.
Does the rooster crow because the cows have come home?
Do the cows come home hoping to hear the rooster crow?
Coincidence does not imply *anything* by way of causation.
And certainly, as the events happen at about the same time,
they would be *empirically* correlated. Fine!!
But!
Is anyone here going to tell me that full mammalian udders
are causally linked (ante hoc or post hoc) to some idiot bird's
answer to a Darwinian territorial imperative???? PLEASE tell me "no."
There's no identity, no 'one-causes-other' link here.
Go get that beer you've been promising yourselves. (I am.)![]()

Does volume cause vol or does vol cause volume?
%%Chicken-Egg question...
You can have heavy volume but no big movements... when people are all in-line and are re-balancing or on expiration or whatever.
You can have low volume and relatively large movements (=higher volatility)...
But usually you have larger volumes on large movements.
Does volume cause big drops? Or do big drops cause heavy trading?
In the end, volatility is price related.... not volume. But you could argue you need volume to move a price. But also, not really... since market makers can move a price without trades... then you trade 1 lot at the close at -20%... tadaa... high volatility with no volume whatsoever.

; sure you can see big volume/vol @ midnight, but that is on old stock/ papercharts LOL