Mid-caps generated most of the buying interest yesterday as the main index headed back up after Thursday’s correction. The Athens Exchange (ATHEX) general index rebounded to 2,151.40 points yesterday, growing by 0.47 percent from Thursday’s close. The blue chip FTSE/ATHEX 20 index expanded by 0.41 percent to close at 1,109.48 points. The mid-cap FTSE/ATHEX 40 index rose by 2.70 percent. The greatest gains among blue chips were for the stocks of Piraeus Bank (up 6.38 percent), EFG Eurobank and Hellaktor (both 6.12 percent). OPAP showed the biggest losses (down 8.71 percent) after Turkey scrapped a tender to sell its national lottery; the Greek firm had bid in the tender as part of a consortium. Turnover reached 228.5 million euros.