FINANCIAL-MARKET traders have earned a pretty shocking reputation in recent years. From manipulating LIBOR, a benchmark interest rate, to rigging the daily fix of foreign-exchange (FX) rates, traders have shown themselves ready not just to stretch the rules, but to collude in outright illegality.

A global code of conduct for the FX market, unveiled on May 25th, aims to put things on a sounder footing. Drawn up over the past two years by a coalition of central bankers, known as the FX Working Group (FXWG), and supported by a panel of industry participants, the code’s 55 principles lay down international standards on a range of practices, from the handling of confidential information to the pricing and settlement of deals.

Such standards seem long overdue in the massive FX market. Roughly $5trn is traded every day (see chart). Many companies, pension funds and money managers depend on banks to hedge their exposure to currency fluctuations. Yet in the past traders colluded with one another...Continue reading