NYSE Euronext’s US retail initiative, a service that was previously described as raising "novel market structure issues" by the Securities and Exchange Commission, has traded almost two billion shares since its launch just over a year ago.

Data supplied to Financial News by the exchange shows an average of 7.9 million shares were traded per day on the Big Board's Retail Liquidity Program in July. A total of 116.68 billion shares were traded across all US markets during the same month.