Two files a day. One book that agrees with the exchange.
Nothing changes on the desk
Your dealers trade exactly as they do today. The terminal produces the same export it already produces, and someone drops it in. There is no integration in your trading path and no API key to ask the broker for.
Every mark comes from the exchange
The official settlement data is pulled from the NSE and BSE archives and applied per contract, per day. Never from a pasted sheet, because a position export carries no timestamp and its price is a mid-session snapshot rather than a settlement figure.
And the invoice ties out
Charges off each dealer’s own slab, interest off a dated deposit ledger, and a monthly bill whose printed lines add up to its printed total. On the reference window it matched the terminal’s own report exactly.