Stocks gained slightly yesterday on the Athens Stock Exchange, with investors again favoring medium-capitalization companies. The ASE compound share index closed at 4,321.85 points, a gain of 4.26 points or 0.10 percent. During the session, it reached a high of 4,340.12 points. The FTSE/ASE 20 index of blue chips declined 0.01 percent to close at 2,387.86 points, while mid-caps and small-caps gained 0.88 percent and 0.94 percent respectively. The FTSE/Athex International gained 0.15 percent, closing at 6,230.02 points. Ten of 17 sectoral indices gained. The top gainers were media (up 2.81 percent), personal and household goods (2.62 percent) and health (1.47 percent). The biggest losers were insurance (down 0.84 percent) and utilities (0.29 percent). Among blue chips, significant gains were posted by Duty Free Shops (up 2.64 percent to 13.24 euros) and Piraeus Bank (2.35 percent to 23.50 euros). Significant losses were registered by cement maker Titan (down 1.54 percent to 40.92 euros). Many mid-caps also posted big gains, led by Teletypos, the owner of TV channel Mega (up 6.67 percent), and toymaker Jumbo (6.52 percent). Turnover reached 578.74 million euros, including 258.51 million in prearranged trades, such as the transfer of Germanos’s shares to Cosmote.