US markets registered their best gains so far this month on good earnings reports from Mattel, Coca-Cola and Johnson & Johnson, as Citigroup rose 1.6 percent after the shock resignation of its CEO. The Dow Jones Industrial Average finished up 127.55 points (0.95 percent) to 13,551.78. The broad-based S&P 500 rose 14.79 (1.03 percent) to 1,454.92, while the tech-rich Nasdaq added 36.99 (1.21 percent) to 3,101.17. The unexplained departures of Citigroup CEO Vikram Pandit and his top aide, chief operating officer John Havens, fed a glut of speculation, with most reports pointing to a clash with the board over policy and perhaps compensation. \"This is a change that just feels like it does not add up,\" said Jon Ogg, an analyst at 24/7WallSt.com. But investors liked the result, and Pandit\'s replacement -- Michael Corbat, the head of Citi\'s Europe, Middle East and Africa division -- pushing Citi\'s shares up 58 cents to $37.24. Forecast-beating earnings from several top companies, and a rebound in leading stocks like Apple (+2.4 percent), Intel (+2.9 percent) and Caterpillar (+2.6 percent), were behind the market\'s overall gain. Johnson & Johnson surged 1.4 percent to $69.74 after reporting quarterly profit of $3.0 billion, or $1.05 a share. Coca-Cola gained 1.6 percent on its 3.9 percent rise in third-quarter net earnings. Toymaker Mattel\'s shares shot up 5.0 percent after it turned in earnings of $366 million, up 22 percent from a year earlier, on a four percent rise in worldwide sales. Against the grain, Goldman Sachs fell 1.0 percent despite reporting a forecast-beating return to profit and hiking its quarterly dividend, to 50 cents from 46 cents. Wireless tower operator Clearwire shares plunged 17.0 percent after Monday\'s surge on speculation that it might benefit from the Softbank takeover of Sprint. US bond prices fell. The 10-year Treasury yield rose to 1.72 from 1.66 percent Monday, while the 30-year yield increased to 2.91 percent from 2.84 percent. Bond prices move inversely to yields.