ET Intelligence Group: NSE's revenue and profit declined sequentially in the September quarter, hit by changes in trading patterns following the implementation of CAS (Closing Auction Session) and a 16% drop in transaction charges. The next phase of growth is likely to come from recovery in trading volumes supported by CAS-related normalisation and its diversification into newer businesses such as commodity derivatives, digital gold products, mutual fund transactions and monetisation of data services.NSE's transaction-charge revenue declined sequentially to ?3,035 crore in the September quarter from ?3,623 crore in the June quarter. The fall was due to lower trading activity amid…