India, May 16 -- Local equity benchmarks managed to keep their head above water in early noon deals with both Sensex and Nifty were trading above 37,100 and 11,150 marks, respectively. Buying in frontline stocks such as Tata Motors, Power Grid Corporation and Infosys were aiding sentiment, while selling in Sun Pharma, Bharti Airtel and Yes Bank kept the gains in the markets in check. Investors were getting some solace with a report that the India's services exports rose by 6.6 per cent to $17.94 billion in March. Services imports in March too grew by 10.55 per cent to $11.37 billion. The trade balance in services for the month under review is estimated at $6.58 billion. However, gains remain limited as the India Meteorological Department (I...