Greek stocks bounced yesterday, ending a six-session losing streak, as banks outperformed, gaining more than 3 percent. The Athens Exchange (ATHEX) rose 2.35 percent to 1,749.95 points, limiting its losses for the week to 7.52 percent. Volatility in bank stocks remained high, with National Bank jumping 6.7 percent to 12.74 euros. Greece’s third-largest lender, Alpha, rose 3.10 percent to 5.98 euros. Gaming group OPAP also ranked among other blue chip winners, rising 5.96 percent to 21.70 euros. On the downside, OTE telecom and the Public Power Corporation each ended 0.06 percent in the red. Turnover dropped to 135 million euros from 163 million in the previous session.