In a ceremony at the White House, President Obama signed the Stop Trading on Congressional Knowledge (STOCK) Act into law.

The STOCK Act makes it illegal for members of Congress and their families and staff, along with members of the executive branch and federal employees, to profit from trading securities using nonpublic information.

The issue of congressional insider trading was brought to light last fall through the book “Through Them All Out” by Breitbart Editor Peter Schweizer.