Greek stock market opens 23 percent down after five-week shutdown

ATHENS (Reuters) - Greece's stock market fell sharply on Monday after being shut down for five weeks under capital controls imposed by the government in Athens to stop a flight of euros from the country.

The main index <.ATG> was down nearly 23 percent in early trading. National Bank of Greece , the country's largest commercial bank, was down 30 percent, the daily limit.

The overall banking index <.FTATBNK> was also down its limit.

The bourse was last open for trading on June 26.

(Reporting by Jeremy Gaunt Editing by Michele Kambas)