[w23j]

I would also really like to know that!

It generally seems to be a thing in trading: https://databento.com/pcaps

There is also this (though this page does not specify what pcap means): https://www.lseg.com/en/data-analytics/market-data/data-feed...

[hnbear]

Look up Corvil devices by Pico.

Commonly used in finance.

https://www.pico.net/corvil-analytics/