Industry players agree that one of the most significant drivers for reform under MiFID is the fragmentation of data sources. After MiFID and the end of concentration rules, firms will be able to choose where to report trades and how to publish post-trade data. "There will be competition among exchanges for publishing post-trade data," says Andrew Allwright, manager of regulatory commercial strategy at Reuters.
Moreover, data vendors will need to aggregate data from multiple sources, even for single stocks. "As a vendor of data, we will have to source data from all potential aggregators of data," says Allwright. "The role of the data vendor will become more complicated as sources of data multiply."
However, Glenn Bedwin, director of institutional research at Thomson Financial, says it won't be that different from what data aggregators already do. "MiFID will bring extra challenges, but from an aggregation perspective, they are manageable and present opportunities for vendors," he says.
Market data traffic will also be affected. "Market data tick volumes will rise as all European markets potentially admit all European securities for trading on a pan-European basis," says Kevin Bourne, global head of execution trading at HSBC. He says that the post-trade intra-market reporting requirements will also have a significant impact on data traffic.
Allwright suggests that there will also be a proliferation of low-quality pre-trade quote data due to the requirement that systematic internalizers publish such information.
But Roberto Rivero, co-founder of UK consultancy Intelligent Growth, says the biggest impact will be the fragmentation of data sources, and the biggest losers under MiFID will be the established exchanges. Many exchanges charge firms for fulfilling their regulatory requirements of reporting trades via exchanges. Under MiFID, firms will have the option to report trades by a variety of means. As a result, Rivero says exchanges will no longer charge for firms to report trades via their infrastructure. "People at the exchanges are writing off their reporting fees," he says.
Nick Dutton, manager of regulatory strategy for the London Stock Exchange, says he doesn't believe London will be significantly affected, because while there will be competitive pressures regarding fees, extensive fragmentation of liquidity is unlikely. "The LSE's order book allows interplay between the other pools of liquidity—and MiFID is trying to encourage this model in other jurisdictions. We're pretty much there already," he says.Inside Market Data