U.S. securities controller is hunting into a Wall Street trading training in which unco super drawing of orders to acquire or delude stocks are settled in a cypher of a second, exclusive to be canceled nearly immediately, the Wall Street Journal reportable on Thursday.

The Securities and Exchange Commission (SEC) is analyzing whether the trading training — famous as “quote stuffing” – is placing whatever investors at a separate by distorting have prices, the Journal said citing grouping old with the matter.

SEC is also scrutinizing whether excerpt mixture played some role in the May 6 “flash crash,” when U.S. have markets suffered a achievement start within minutes.

The controller is also inquiring whether a training titled as “sub-penny pricing,” is utilised to cook the market, the production said citing a mortal old with the matter.

In the sub-penny pricing method, the orders are priced in increments as diminutive as one-tenth of a coin and farther absent from the actualised toll at which a have is trading.

An SEC spokesman declined to interpret to the Journal on the inquiry.

SEC could not directly be reached for interpret by Reuters right lawful U.S. playing hours.