What Is ‘Print Size’ and Why Is It a Concern for Institutional Traders Using Dark Pools?
'Print size' refers to the size of the executed trade that is publicly reported. For institutional traders, the concern is that a large print size from a dark pool execution, even though the trade was anonymous, can reveal the presence of a large buyer or seller.
This post-trade transparency can still lead to 'information leakage' and market impact, as other participants can infer the trader's strategy and adjust their own trading accordingly.