Shares of HDFC Limited and HDFC Bank came under selling pressure on account of profit booking after staging a massive upmove in the previous session, analysts said. In Monday's session, HDFC rallied a whopping 16 per cent, its biggest single day move since May 18, 2004 after merger plan with HDFC Bank was announced. HDFC Bank shares also succumbed to profit booking and fell 2.75 per cent to Rs 1,611 during the session.