BUZZ-Loblaw Cos Ltd: Biggest gain in nearly 2 yrs
** Canadian food and drug retailer's shares up as much as 4.8 pct to C$74.23 - post biggest percentage gain in nearly 2 yrs
** Q2 earnings higher than expected as same-store sales and gross margins improve in drug retailing business
** Q2 adjusted earnings/shr C$1.01 vs analysts' estimate C$0.94
** Up to Tuesday's close, stock had risen about 8 pct this year
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