Global filings for initial public offerings are accelerating to the fastest pace since 2007 just as Greece's debt crisis and China's rising inflation drag down global stock markets.

At least 720 companies including Groupon Inc. and Beijing Jingneng Clean Energy Co. have announced plans this quarter to seek $67 billion in IPOs, according to data compiled by Bloomberg. That's the largest number of deals in a quarter since 794 IPOs were announced during the final three months of 2007, the data show.

While the MSCI World Index's rally to an almost three-year high in May spurred companies to register for initial share sales, the benchmark has since retreated 7.8 percent. More European deals have been pulled this year than since at least 2006 amid concern that Greece will default. All but five of the biggest IPOs in Hong Kong have declined since their debut, with Chinese inflation rising to its highest since 2008, according to data compiled by Bloomberg.