BATS President O'Brien Abruptly Leaves

William O'Brien, former president, BATS

Ratterman previously held both the CEO and president roles from June 2007 through Jan. 2014. He joined BATS in June 2005 as a founding employee. O'Brien became president after Direct Edge completed its merger with BATS on Jan. 31. He had been CEO of Direct Edge since 2007.

In April, O'Brien engaged in a heated debate on CNBC with author Michael Lewis and IEX founder Brad Katsuyama in which he defended his exchanges practices regarding high-frequency trading. The argument generated international headlines. It is unclear whether this contributed to today's action.

A spokesman for BATS turned down a request as to the reason for O'Brien's departure.

Only users who have a paid subscription or are part of a corporate subscription are able to print or copy content.

To access these options, along with all other subscription benefits, please contact or view our subscription options here:

You are currently unable to copy this content. Please contact to find out more.

Interop tech buys time for buy-side fixed-income traders

A few buy-side traders and portfolio managers spearheading a drive for greater interoperability are reaping the rewards of increased workplace efficiency. Is interoperability the fixed-income panacea the buy side has been looking for?

GenAI and HFT: A competitive edge?

Timing is critical in the capital markets. IBM researchers say genAI’s predictive abilities in combination with AI/ML models can translate into profitable HFT opportunities.

You need to sign in to use this feature. If you don’t have a WatersTechnology account, please register for a trial.

Sign in
You are currently on corporate access.

To use this feature you will need an individual account. If you have one already please sign in.

Sign in.

Alternatively you can request an individual account here