Nifty Bank soared to a new record high on Monday, crossing the 44,400 level, due to non-stop buying by foreign institutional investors and optimism surrounding the US debt ceiling deal. The banking index has rallied around 400 points, while Nifty50 and Sensex are approaching their previous peaks. HDFC twins were the biggest contributors to the upside in both Sensex and Nifty, and all 12 counters in the banking index were in the green. Analysts warn against the urge to buy on the higher side, with valuations difficult to justify at higher market levels and the possibility of selling pressure.