Off-Exchange Equity Trades Grow in March [UPDATE]

dark pools
Increasing amounts of order flow in the US equity market is being executed internally or through dark pools.

New research from the TABB Group has shown that the level of US equity trades executing off-exchange is growing.

In a commentary note, Tales From the Dark Side: Out of Sight but Very Much in Mind, the consultancy estimates that 32.96 percent of US equities trading in March was being performed outside of registered exchanges. [Tabb originally stated the volume at 37 percent, please see note below.] By comparison, the amount in 2008 was 15 percent.

TABB attributes the recipients of the flow as internalized trading, where brokers match orders between a firm's own desks, and dark pools, taking 24 percent and 13 percent respectively.

Increasing speeds of trading, sophistication of smart order routers, decreasing volumes in the equities markets, the cost of commissions, and technological development of both dark pools and internalization engines are all cited as reasons for the growth in off-exchange trading.

"Historically, trading desks were able to match buying and selling interest received concurrently on the desk," says the commentary, written by CEO Larry Tabb and research analyst Cheyenne Morgan. "As technology now allows messages to be sent and responded to in microseconds, trading desks can send out messages to solicit the other side of the trade. If an order can't be found directly, it then moves into the firm's dark pool. If still unable to be matched, the dark pool sends messages to a wider array of market participants to trade. If still unexecuted, the order is sent to other dark pools that message a wider group of traders. If by the time the order went through two or three different dark pools and messaging cycles and the order remained unexecuted, it would then go to the exchanges. This all occurs in a fraction of a second, all managed by a series of electronic routing engines."

Exchanges, in this day and age, only get orders that almost anyone in the professional community does not want.

The commentary also suggests that, as volumes of dark liquidity grow, the US Securities Exchange Commission is likely to take a far greater interest in the inner workings of these crossing networks. It also says, while exchanges are "furious" at what is happening, and some traders are unhappy with the information leakage, most see the benefits and savings of dark execution as outweighing message weight.

"Exchanges, in this day and age, only get orders that almost anyone in the professional community does not want," Tabb and Morgan add.

[Note: There was an error made in Tabb's original report. Here is Larry Tabb's statement:

Due to an error, the March percentage of order flow traded away from exchanges should have been 32.96 percent instead of the 37 percent we reported on April 9. This did not represent a historic high. Nevertheless, the error does not invalidate the concerns expressed in our comments about the rise in off-exchange trading.]

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