IST, the barometer index, the S&P BSE Sensex, rallied 484.66 points or 0.63% to 77,240.51. The Nifty 50 index added 184.20 points or 0.79% to 23,433.70.

The P/B ratio shows how a stock's market price compares to its book value. It helps gauge whether a stock is undervalued or overvalued relative to its net assets.