The SEC has sent at least three dozen subpoenas to hedge funds and brokerages within the past month, as it steps up its investigations of potential insider-trading violations, according to the Wall Street Journal.Some of the subpoenas focus on investment bankers, including the role of Goldman Sachs bankers in around a dozen health-care deals since 2006, according to sources who spoke to the WSJ. It isn't clear whether the subpoenas are related to the insider-trading case involving New York hedge fund Galleon Group.

In this video, I spoke to Larry Tabb, founder and CEO of Tabb Group, and Yvonne Pytlik, managing partner, Global Compliance Risk Management Corp about how financial firms can thwart insider trading.

In this video, I spoke to Larry Tabb, founder and CEO of Tabb Group, and Yvonne Pytlik, managing partner, Global Compliance Risk Management Corp about what processes and technology financial firms can use to thwart insider trading.