Dark Pool Controls for Reducing Adverse Trading and Gaming

Summary

The document outlines possible controls that dark pool operators and participants can use to limit predatory or otherwise undesirable trading. The measures listed include excluding particular firms, requiring minimum order sizes, allowing participants to block counterparties, and analyzing incoming flow to distinguish types of trading activity. The question also raises whether banning immediate-or-cancel orders is necessary, since restricting order types may reduce investor flexibility.

The response presents the controls as a summary of suggestions, not as a technical assessment or evidence that any specific venue uses them effectively. It suggests that exclusions and flow analysis may be especially revealing, while noting that their value depends on how well they are implemented. A whitelist of acceptable counterparties is one possible result of participant-level exclusions. The document does not define measurable standards, compare venues, or establish that any listed measure alone prevents gaming.

Key ideas

• Dark pools may exclude firms at the venue level to limit unwanted counterparties.
• Minimum order sizes are one proposed control against undesirable interaction.
• Participants may block firms themselves, creating a whitelist of acceptable counterparties.
• Flow analysis can help classify incoming trading activity.
• The effectiveness of exclusions and flow analysis depends on implementation, and no measurable evaluation is provided.

Tags

# Effective anti-gaming controls in dark pools


# Effective anti-gaming controls in dark pools












What are some indicators that a dark pool operator has effective anti-gaming controls in place? There are some that prohibit IOCs (immediate or cancel) but is that necessary? It seems like that could hurt the investor by limiting order types.

This sort-of user's guide to dark pools vaguely discusses some possible controls. Anyone have more technical knowledge?

## Answer by Bob Jansen (score 2)

https://quant.stackexchange.com/a/9278

So to summarize the comments given, dark pools seem to do the following:

- banning of specific firms by the dark pool

- requiring a minimum order size

- banning of firms by the participants

- flow analysis to separate different types of players

To me it seems that this covers most of the reasonable actions they could possibly take and whether this is done seems to be a good indicator. It is up to you to decide how well the first and last item are implemented. By banning the majority of the firms you can effectively make a whitelist which allows you to only trade with firms you like.

Shown in full with attribution under the source's licence. Licence: CC BY-SA 4.0 (Stack Exchange)

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.