India, Sept. 12 -- With a positive opening Indian equity benchmarks extended their previous session's gains and are trading firm in early deals on Thursday. Sensex and Nifty reclaimed their crucial 37,400 and 11,050 levels, respectively. Buying in financial, metal, basic materials and consumer durables supported the markets, however selling in Telecom, TECK and information technology shares capped the upside. Investors are eyeing the data on factory output (IIP) for July and retail inflation (CPI inflation) for August set to be release later in the day. Traders took note on report that Union minister Ravi Shankar Prasad termed the low Gross Domestic Product (GDP) growth as a 'temporary phenomenon', and said things will improve in future as ...