Blue chips, such as National Bank, OPAP, OTE and PPC, bolstered the Greek bourse yesterday, generating gains for the majority of stocks on the board. The Athens Exchange (ATHEX) general index closed at 1,637.15 points yesterday, expanding by 1.95 percent over last Friday’s close at 1,605.82 points. It was the sixth rising session for the index of the last seven, with total gains of 6.19 percent. The blue chip FTSE/ATHEX 20 index grew yesterday by 2.09 percent to end up at 798.01 points. Gaming company OPAP led blue chips with a 7.09 percent rise, ahead of Motor Oil (up 4.50 percent), Marfin Investment Group (3.61 percent), Public Power Corporation (3.34 percent) and OTE telecom (3.16 percent). National Bank gained 2.41 percent to end at 8.49 euros. Aided by OPAP’s rise, the travel and entertainment sectoral index outperformed yesterday with a 6.29 percent increase. There were 116 stocks heading up, 54 going down and 52 remaining unchanged. Dairy company Evrofarma led gainers with a 13.51 percent rise, while Paperpack-Tsoukaridis suffered a fall of the 20 percent limit. Turnover came to 130.2 million euros, up from last Friday’s 97.3 million.