Banking stocks were under pressure during Tuesday's trading session as the Reserve Bank of India (RBI) has warned about a double-digit rise in gross non-performing assets (GNPA) by September 2021. Investors turned cautious as this will further impact earnings of the banking sector led by higher provisions and deteriorating asset quality. At around 11.31 am, Nifty Bank was trading at 31,896.35 down 102.55 points or 0.32%. The index has tumbled to an intraday low of 31,725.85. Private banks saw most selling pressure compared to the state-owned banks. Nifty PSU Bank was trading at 1,818.85 up 0.91% and Nifty Private Bank was down 0.49% at 17,613.20. On Nifty Bank, Bandhan Bank was the top underperformer down nearly 3% followed by Kotal Bank which tumbled by nearly 2%.