Finance chiefs from the Group of 20 nations are likely to discuss how to prevent emerging economies from stalling when they gather Friday for a two-day meeting in Moscow, with market volatility casting a shadow over their future economic prospects.

The finance ministers and central bank governors of the leading economies will gather at a time when speculation about the U.S. central bank trimming its asset purchases and concern about a Chinese slowdown are driving down stock prices in some developing nations and the value of their currencies.

The global financial market has turned volatile after U.S. Federal Reserve Chairman Ben Bernanke said June 19 that the current monetary easing step through asset purchases could be tamed later this year if the economy improves as forecast.