Despite the gloomy US finance climate, investors rushed to Visa's initial public offering with 17.9 billion dollars - the largest IPO in US history and the second largest in the world, DPA quoted reports as saying Wednesday. The offering was opened Tuesday, when the world's largest payment and credit card network threw open the gates to sell 406 million shares at 44 dollars each - above the expected 37 to 42 dollars, Bloomberg financial news reported. The sale raised the San-Francisco-based company's value to 42.5 billion dollars, compared to rival MasterCard's 27.6 billion dollars. The results were larger than AT&T Wireless Group's 10.6-billion- dollar stock offering in 2000 and rank second in the world after the 22-billion-dollar debut in 2006 of Industrial & Commercial Bank of China Ltd, according to Bloomberg.