BSE contracts plunge 30% after CAS rollout, yet premiums soar 75%
In the first week of the new Closing Auction Session, BSE’s average daily contracts fell 30.6% week‑on‑week, while premium per contract surged 74.8%, lifting premium turnover 21.3% and pushing BSE’s market‑share to 37.1%. The shift signals tighter price discovery and higher pricing power for deep OTM options.