Source data
Everything published here derives from the daily margin trading disclosures that the National Stock Exchange and the BSE publish on their own websites. No broker feed, no scraped portal, no third-party data vendor is involved. Both exchanges publish a file for each trading day listing the securities funded under the Margin Trading Facility, the number of shares, and the funded value.
We do not receive privileged access to any of this. The same files are available to anyone. What this site adds is the daily collection, the combination of the two exchanges, and the history — the exchanges publish a snapshot, not a series.
The one-day lag
Exchange files describe the previous trading day and are published that evening. A figure labelled 18 August is the book as it stood at the close on 18 August, retrieved on the nineteenth. This is a property of the source, not a delay we introduce. Weekends and exchange holidays have no file, so the series covers trading days only.
Combining NSE and BSE
The two exchanges publish separately, and a stock funded on both appears in both files. We match the two on ISIN rather than on ticker, because the same company can carry different symbols on each exchange. The combined figure for a stock is the sum of its NSE and BSE funded value; the market-wide book is the sum across every funded security on both exchanges.
Where a stock appears on only one exchange, it is tagged as such on the tables rather than being silently reported as a combined figure.
Units and rounding
The exchanges report in lakhs. We convert to crore, which is how the market discusses these numbers, and round for display. Share of book is shown to two decimal places because most individual stocks sit below one percent, where a whole number would round almost everything to zero.
What the archive cap means
The per-day scripwise archive retains the 500 largest positions for each trading day. That covers the overwhelming majority of the funded value, but it means the archive should not be summed to derive the market-wide book — the total shown on the dashboard comes from the exchanges' own net figures, not from adding up the rows we retain.
The stocks list accumulates every security we have ever recorded a book against, so it grows over time and is larger than any single day's file.
If you want the underlying numbers rather than the pages, the data and API page documents the JSON and CSV files this site is built from, all of which are free to use with attribution.
Known limitations
The data shows the aggregate funded book, not who holds it. There is no way to tell from these disclosures how many investors are behind a position, how concentrated it is, or at what prices it was built.
Exchange files are occasionally revised after publication. Where a revision changes a past day, our stored history reflects the file as it stood when we retrieved it, unless we rebuild that day.
Interest rates, haircuts and eligible-stock lists on the Brokers and Calculator pages come from broker disclosures and change without notice. Those are compiled by hand and carry the date they were last checked. The daily MTF figures are automated; the broker information is not.
Corrections
If a figure here disagrees with the exchange file, the exchange file is right and we want to know. Tell us what looks wrong and we will check it against the source and correct it.
Independence
IndiaMTF.com is an independent informational project. It is not a brokerage, is not affiliated with NSE, BSE or any SEBI-registered entity, and does not provide investment advice. We take no payment from any broker: the Brokers page carries plain outbound links, no broker pays for placement, and the ordering is by published interest rate.