Investors pulled nearly $300 million out of an Asian stock fund co-run by veteran investor Mark Mobius last month, extending a dramatic exodus from a fund that was for years the biggest of its kind in Asia.

The outflow, equivalent to more than 5% of Templeton Asian Growth fund's $5 billion in assets at the start of the month, outpaced withdrawals from other big stock funds in the region as volatility shook global markets, according to data provided by Morningstar.