On 10 October the Reserve Bank of India issued two circulars most of the market read only as far as the headline: "RBI tightens forex rules." The rupee firmed to 94.96 against the dollar and attention moved on. The detail that matters is in the pricing mechanics.

The new Foreign Exchange Risk Reserve, introduced by A.P. (DIR Series) Circular No. 26 (RBI/2026-27/292), requires a bank to park 20% of the rupee-equivalent notional of an eligible forex derivative in cash with the RBI — daily, for the life of the contract. It applies only where the customer is buying foreign currency against the rupee to hedge a current-account exposure, above a $2 million notional. Days later the RBI extended the same reserve to banks' hedges of their own books, with no minimum contract value.

So hedges that sell dollars carry no reserve; hedges that buy dollars do. Exporters covering receivables are untouched; importers covering payables just became expensive to serve. A second circular (No. 25, RBI/2026-27/291) also cut the threshold for hedging contracted exposures without establishing the underlying from $100 million to $5 million, and barred rebooking of cancelled rupee contracts — rollovers survive, cancel-and-rebook does not.

Banks hold the cash, but banks price funding into forward quotes. So the question isn't where the rupee goes. It's which companies hedge imports gross — and which net first.

The gross hedgers

Ambuja Cements (AMBUJACEM) publishes the cleanest arithmetic available. Per its FY26 annual report, as at 31 March 2026 it carried creditors (including capital creditors) of ₹244.42 crore in USD, ₹16.17 crore in EUR and ₹1,175.44 crore in CNY — against forward contracts of ₹225.37 crore, ₹2.18 crore and ₹922.73 crore. That covers 92% of its dollar payables and 79% of its yuan payables. Add ₹34.65 crore USD and ₹15.01 crore EUR of forwards against firm commitments, and the disclosed buy-side book is roughly ₹1,200 crore.

Apply the new rule — our arithmetic, not a filing figure — and Ambuja's banks must hold about ₹240 crore in cash at the RBI for as long as those contracts run: roughly 100–120 basis points a year on the notional at a ~6% cost of funds, if fully passed through.

The direction of travel is the tell: Ambuja's FY25 annual report shows ₹690.47 crore of CNY exposure hedged with suppliers rather than bank forwards, while the FY26 table shows no supplier-hedged amount at all. Ambuja moved its yuan cover into precisely the instrument the RBI just taxed.

Tamil Nadu Newsprint & Papers (TNPL) states the gross-notional problem outright. Per its FY26 annual report: "Hedging of trade exposures viz., imports and exports are hedged separately and not on net exposures basis." TNPL imports pulp, waste paper and coal and exports paper, but covers each leg separately instead of netting them. Every rupee of import cover is reserve-eligible, and the export cover that would have offset it earns no relief. GHCL is the heaviest buy-side hedger here — and the best prepared for the rebooking ban. Its FY26 annual report says that on capital goods imports, upon establishment of a letter of credit, "the company takes 100% forward cover." Its FY25 report supplies the asymmetry: on exports, "the Company chooses not to hedge and instead converts them at the prevailing exchange rate." GHCL buys dollars forward and sells them spot — maximum reserve exposure. Yet its FY24 report shows foresight: on coal and anthracite, "we cover only after establishment of Letter of credit to avoid cancellation / roll over of forward contracts." GHCL designed out cancellations years before the RBI banned rebooking them.

The netters

Pidilite Industries (PIDILITIND) has effectively already written the compliance manual. Per its FY26 annual report, cover is taken on a netted basis: "the net trade import exposure is arrived at (i.e. Imports – Exports = Net trade exposures)," then "netted off with the outstanding forward cover as on date and with the surplus foreign currency balance available in EEFC A/Cs." Netting imports against exports and against existing dollar balances cuts the buy-side notional at source. The same note confirms "the forward cover deals are all backed by actual trade underlines," so the $100m-to-$5m documentation cut is a non-event. The filing even anticipates the moment: "The Company does alter its hedge strategy in relation to the prevailing regulatory framework and guidelines that may be issued by RBI, FEDAI or ISDA."

It isn't a free pass: aggregating exposures into "weekly baskets" pushes individual deals above the $2 million line. But netting cuts the notional by far more.

Rico Auto Industries (RICOAUTO) goes furthest. Per its FY26 annual report, it "follows a policy of matching of import and export exposures (natural hedge) to reduce the net exposure in any foreign currency," using derivatives only "whenever the natural hedge is not available." A natural hedge needs no bank contract, so it attracts no reserve.

The bank writing the cheque

Federal Bank (FEDERALBNK) shows what extending the reserve to banks' own books means. Per its FY26 annual report, the notional principal of forward exchange contracts outstanding at 31 March 2026 was ₹5,136.27 crore for hedging (from ₹2,441.51 crore) and ₹1,09,014.86 crore for trading — against ₹80,366.74 crore a year earlier and ₹21,292.74 crore in FY24. A fivefold expansion in two years, into a rule that now demands daily cash against the dollar-buying side of it with no minimum contract size. Much of a market-making book is offsetting, and eligibility turns on fine print the circulars leave open — but that scale is why banks have raised liquidity concerns publicly.

What retail investors should do

Don't trade this as a rupee call. Trade it as a disclosure test. Open the "foreign currency risk" note in the latest annual report of any importer you own and answer two questions. Does the company net imports against exports before buying cover, or hedge each leg separately? Pidilite and Rico Auto say they net; TNPL says it does not; Ambuja gives you a hedge ratio above 90% and a notional to multiply by 20%. And is that cover backed by documented underlyings rather than cancel-and-rebook? Companies that leaned on the old $100 million no-documentation allowance have a working-capital conversation coming with their banks. It won't appear in a results release — it will surface as a wider forward premium buried in raw material cost.

Data sourced from company filings on NSE via Xaro.