Greek stocks continued their rebound for a second day yesterday, in a session marked by wide price fluctuations which analysts partly attributed to the maturation of the February series of derivative contracts. The initial negative sentiment was overrun by significant placements in small- and mid-caps toward the end of the session. The Athens Stock Exchange (ASE) general index ended 0.52 percent up at 4,116.27 points. The blue chip FTSE/ASE 20 index added 0.33 percent, while the respective mid- and small-cap indices advanced 1.61 percent and 1.53 percent respectively. Only four of the 17 sectoral indices headed south, with raw materials outperforming with gains of 3.81 percent. Metals group Viohalco, which took a beating early this week after continuous hefty gains, outperformed other blue chips by surging 4.61 percent. Public Power Corporation (PPC) advanced 2.94 percent, while banks Alpha and Piraeus added 2.67 and 1.44 percent respectively. In contrast, Eurobank and Titan cement shed 1.91 and 1.31 percent respectively. Turnover came to 339.97 million euros, of which 120.1 million was accounted for by the four most marketable securities, National Bank, Eurobank, PPC and Alpha Bank.