Foreign investors slightly reduced their positions in Greek stocks in November, withdrawing over 100 million euros from the market, Hellenic Exchanges said yesterday. Hellenic Exchanges, the company that operates the Athens stock and derivatives markets, said international investors held 49.3 percent of the total market capitalization last month, down from 49.7 percent in October. International investors as a whole were net sellers by 106.58 million euros, it said in a statement. Outflows from foreign institutional investors reached 153.5 million euros but other international portfolios including retail players and offshore companies were net buyers. Greek investors poured 54.3 million euros into equities last month, in a bid to take advantage of falling prices as the benchmark general index retreated 15.7 percent to 2,263.27 points.