The market was caught offguard by yesterday's dramatic raid of three Caterpillar offices, including its Peoria Headquarters, which reportedly included agents from the IRS, FDIC and Commerce Department, and sent the stock tumbling by the most in over half a year. The raid took place just one week after former CAT CEO Doug Oberhelman met with Donald Trump, which prompted the president to say that he "loves" Caterpillar.

While the catalyst behind the raid still remains unclear, we reminded readers yesterday that this was not the first time CAT has gotten in trouble with the authorities: back in 2014 CAT and PWC got in trouble before Congress for evading taxes using offshore locations when this infamous line came up: "What the heck, we'll all be retired when this audit comes up on audit."