Defence Stocks Today: Garden Reach Ship Builders and Cochin Shipyard and other domestic defence sector stocks extended gains for the fourth straight session on May 14. The Nifty India Defence index surged nearly 5 per cent to an intraday high level of 7,777.6 as 17 out of the 18 constituents of the index closed in the green. At the day-high the Nifty Defence index has rebounded nearly 55 per cent from its recent low of 5,025.35 which it hit on March 3.