Washington, from the halls of Congress to the offices of its regulatory agencies, is a leaky sieve of market-moving information, and savvy investors are rapidly finding a way to take advantage. The Wall Street Journal has over the past year delved deeply into this murky area to reveal the extent of insider information provided sometimes unwittingly by the federal government to eager Wall Street traders. Much of this activity is legal—as the old adage goes, that's often the scandal in Washington. Some of it skirts the line and is considered by federal prosecutors as potential insider-trading. For certain, most of it is unregulated and hidden from public view, were it not for the efforts of reporters such as team assembled by the Journal and led by Brody Mullins.