The Depository Trust and Clearing Corporation (DTCC), the post-trade group, has warned that Europe and the US could lose derivatives business to Asia while they delay finalisation of new rules governing the vast off-exchange trading market. Larry Thompson, general counsel of DTCC, warned on Wednesday that broker-dealers could be attracted to Asia as the continent’s regulators were more likely to meet a deadline imposed by the G20 group of nations to introduce far-reaching reforms to the $6tn over-the-counter (OTC) derivatives market.