Currency Traders Coordinated in Chat Rooms Around the Daily Fix
Major banks were penalised for conduct in foreign exchange markets, much of it concentrated around a brief window used to set benchmark rates.
The Fix
Enormous quantities of foreign exchange business are executed at benchmark rates rather than at whatever price prevails when an order arrives. Index funds rebalancing, corporations converting revenue, and asset managers hedging often transact at a published fix.
Those benchmarks are calculated from trading activity during a defined window. Because a great deal of volume is executed at that single reference price, the window is disproportionately important.
The Problem With Concentrated Volume
A bank that receives a large client order to be executed at the fix knows, in advance, that substantial buying or selling will occur at a specific moment.
That is genuinely valuable information. If several banks share what they know about their respective client orders, they can collectively anticipate the direction of the fix and position accordingly, and they can also coordinate how they trade during the window in ways that influence where it sets.
Knowing that a large order must execute at a specific moment is information about the future price, and sharing it converts client information into a trading advantage.
What Investigations Found
Regulators in several jurisdictions documented traders at different banks communicating in electronic chat rooms, sharing information about client orders and positions ahead of the fix.
The conduct involved substantial penalties across major institutions, along with individual prosecutions in some jurisdictions with mixed outcomes.
The core allegation was not that prices were fabricated but that competitors shared confidential client information and coordinated behaviour in a market where they were meant to compete.
The Conflict Underneath
The structural issue is that dealers act in two capacities simultaneously. They execute orders for clients, which is an agency role carrying duties to the client. They also trade for their own account, which is a principal role.
When the same desk does both, information from the agency business is available to the principal business unless controls prevent it. That is the conflict, and it exists whether or not anyone abuses it.
What Changed
The response included a global code of conduct for foreign exchange markets, extension of the calculation window for major benchmarks to make influence more difficult and expensive, restrictions on electronic communications between traders at different firms, and stronger internal separation between client execution and proprietary activity.
Widening the window is the most elegant fix. Influencing a price over a longer period requires far more capital and carries far more risk, so the economics of manipulation deteriorate without prohibiting anything additional.
The Lesson for Anyone Executing Orders
The practical point for an institution transacting in size is that telling a dealer what you need to do is necessary and costly. Information about your intentions has value, and the more predictable and concentrated your execution, the more valuable it is to whoever knows about it.
This is why large institutions split orders across time and venues, and why execution quality is measured rather than assumed.
The Bottom Line
The fix concentrated enormous volume into a brief window, which made advance knowledge of client orders extremely valuable. Predictable execution is expensive whenever someone else can see it coming.