PSE increased during very lazy day with traded volume below the averages as US markets are closed today. CEZ was the only actively traded stock moved higher on the back of the ongoing share-buy-back program and closed at CZK 1,089. Komercni banka lost almost 1.5% and showed the worst performance of the day after rally during the past two weeks. Telefonica (611 CZK, 0,68%) O2 CR increased as ex-dividend day approaching.