Stock market today: AU Small Finance Bank, Bharat Heavy Electricals Limited (BHEL), Bajaj Consumer Care, Tata Technologies, Titagarh Rail Systems, UCO Bank, Railtel Corporation Of India, Rallis India, ideaForge Technology, Ircon International, JK Tyre & Industries, and Graphite India, hit their 52-week lows in intraday trade on BSE on Tuesday, February 18, due to broad-based losses on persistent worries over tepid corporate earnings and sustained foreign selling, while the broader small and midcaps declined on valuation concerns.