Alibaba Group Holding Ltd. (BABA) raised the amount it’s seeking in its initial public offering to as much as $21.8 billion, coming a step closer to breaking a global fundraising record after investors showed strong interest in the shares. Founder Jack Ma told prospective investors in Hong Kong yesterday that he won’t seek too high a valuation, two people who attended the meeting said. Alibaba’s IPO could top Agricultural Bank of China Ltd.’s more than $22 billion sale in 2010 as the world’s biggest.