In the options market, the highest Call Open Interest (OI) is at the 27,500 strike, followed by the 27,000 strike. Meanwhile, the maximum Put OI is at the 26,000 strike, with additional interest at 25,000. Call writing is taking place at the 27,000 and 26,200 strikes, while Put writing is evident at the 26,000 and 25,000 strikes.