Stocks gained yesterday on the Athens Stock Exchange, thanks to investor interest in bank stocks and betting agency OPAP. The general index broke through 3,100 points for the first time since March 15, 76 sessions ago. Sentiment was helped by European markets, many of them reaching three-year highs despite a fresh rise in oil prices. The ASE general index closed at 3,102.19 points, a gain of 28.70 points or 0.93 percent. The FTSE/ASE-20 index of blue chips gained 0.99 percent to close at 1,750.66 points. Mid- and small-caps gained 0.24 percent and 0.46 percent, respectively. Most blue chips scored significant gains. Among them were Emporiki Bank (up 5.29 percent to 22.08 euros), OPAP (2.84 percent to 23.86 euros), EFG Eurobank (1.73 percent to 25.90 euros), National Bank (1.36 percent to 29.78 euros, a 52-week high), Coca Cola HBC (1.32 percent to 22.98 euros), and Cosmote (1.08 percent to 14.96 euros). By contrast, losses were recorded by Intracom (down 1.58 percent to 3.74 euros), PPC (0.88 percent to 20.16 euros) and OTE (0.37 percent to 16.22 euros). Of the 332 traded stocks, 150 gained, 124 declined and 58 ended unchanged. Turnover rose to 190.29 million euros, including 20.23 million in pre-arranged trades.