Market shakes off GDP news but 580 still looms large. The market did not seem affected by last week's announcement that Q1 GDP growth was below last year's level, probably because of announcements today that retail sales grew 9.1% YoY and that the country reported a USD776 million trade surplus. The VN-Index opened the week with an upward trading session, gaining 0.6% to close at 575.7.