The Bank Nifty index remained under bearish pressure, breaching the crucial level of the 50-day exponential moving average (EMA) on a closing basis. The index is now eyeing its next immediate support at 47,400, and a breach below this level could intensify selling pressure towards the 47,050 mark, corresponding to the 100-day EMA. On the upside, the index faces immediate resistance at 48,000, where aggressive call writing is observed. A decisive breakthrough above this resistance level may trigger short-covering moves towards the 48,500 mark.