Stock markets open with marginal gains, Sensex surges 67 points, Nifty above 24,860

Stock markets update: Equity benchmark indices opened in green registering marginal gains in early trade on Tuesday amid positive global cues. In the early trade, the 30-share BSE Sensex climbed 67 points to 81,423.53. Meanwhile, the Nifty was also up by 25 points to 24,861.35.