Banknifty future today closed at 16484 with heavy loss. Here 16480 support is now tested, if banknifty gives reversal from here then it will be swing buy opportunity for tgt 17400+. Breakdown will result in 500 to 600 points drop or selloff. For intraday, banknifty future support zones are 16365 and 16200. On upside 16625 and 16820 are resistance levels.