[senkora]

Those batched trades are called “auctions” and they are a part of many exchanges.

I think it’s pretty uncommon to do them every N seconds.

A common pattern is to collect quotes before the market open, do an “opening auction” to set the opening price, and then switch to continuous trading for the rest of the day. If trading in a stock ever pauses (which can happen for a variety of reasons) then another auction occurs when trading is restarted.