Markets opened up strongly, blue chips in focus. Strong opening on the blue chips soon saw indices taking off in the first session of the week. At some point during the day, the VNI gained as much as 17 points, led by heavyweights VNM, MSN, BVH and GAS. In fact GAS was at ceiling almost throughout Monday session. But selling pressure as the closing bell rang surprisingly sent the ticker back to a mild 1.6% gain.