The Informant!
Starring Matt Damon, Scott Bakula, Joel McHale
Written by Scott Z. Burns, based on the book by Kurt Eichenwald
Directed by Steven Soderbergh
Plot: The vice president (with a knack for telling lies) of an agri-business becomes an informant and aids the US government in a price-fixing investigation they are conducting on the company he works for.

"Loads of silly fun. Matt Damon is hilarious and totally makes the movie."