In public, Toyota is running apologetic TV ads and vowing to win back customers’ trust. Behind the scenes, the besieged carmaker is trying to learn all it can about congressional investigations, maybe even steer them if it can.

The Dow posted its largest one-day percentage gain in three months on Tuesday, boosted by reports of an aid plan for heavily indebted Greece.

Shares of investment company Solar Capital Ltd. dropped in its market debut Tuesday after it raised less money than it had hoped for in a weak market for IPOs.

Trans-Atlantic stock exchange operator NYSE Euronext said Tuesday that it returned to profit in the fourth quarter as cost-cutting efforts helped offset a drop in revenue amid falling global share trading volumes.

Major business events and economic events scheduled for Wednesday: WASHINGTON — Commerce Department releases international trade for December, 8:30 a.m.

Shares of Caterpillar climbed more than 5 percent Tuesday after an analyst upgraded the stock, saying the heavy equipment maker is well positioned to ride out the economic recovery.

Shares of Encore Capital Group Inc. soared nearly 17 percent Tuesday after the debt collection firm reported better-than-expected fourth-quarter profit.

Shares of Parkway Properties Inc. plunged Tuesday after the office property owner slashed its dividend. Late Monday, Parkway said it would reduce its annual dividend rate to 30 cents from $1.30.

Shares of Veeco Instruments jumped almost 10 percent on Tuesday, a day after the maker of precision manufacturing equipment posted better-than-expected fourth-quarter profits.

Railroad stocks advanced with the broader market Tuesday after a Stifel Nicolaus analyst upgraded two of the biggest North American names to “Buy,” citing their ability to grow earnings with even a gradual economic recovery.