Bank Nifty options and futures market activity increases sharply, with total options open interest rising 90.04% since the last expiry to about 1.32 million contracts, according to NDTV. The reporting highlights that traders build large positions around the 56,000 strike as overall F&O activity accelerates. While the figures indicate a substantial increase in the number of outstanding options contracts, the information provided does not specify changes in direction of the underlying index, or whether the accumulation is concentrated in calls, puts, or both. The update is based on open-interest data, which reflects positions held in derivative contracts rather than trading volume in a single session. The reports do not mention any regulatory action, major news affecting banks or the index, or specific broker-level flows. Overall, the key market signal in the available sources is the large expansion in Bank Nifty options open interest and the notable positioning near the 56,000 strike as F&O activity rises.