Rupee Under Pressure: Why India's Forex Reserves Fell $51 Billion in a Month

In the four weeks to 2 October 2026, India's foreign exchange reserves fell from a lifetime high to $734.61 billion, a slide of nearly $51 billion, including the single largest weekly drop ever recorded for the country's reserves. The rupee, meanwhile, is trading around ₹96.6 to the dollar, within touching distance of the all-time low of 96.96 it hit in May. On the week of the biggest reserve decline, the reason was no mystery: the Reserve Bank of India was selling dollars to defend the currency [1][2].

As the rupee has slid roughly 7% through 2026, among the weakest performances of any Asian currency, the RBI has rolled out an evolving playbook: a concessional swap window that pulled in more than $136 billion and briefly made India the world's fourth-largest reserve holder; a rate hike on 7 October; new curbs on currency derivatives; and, on 10 October, a special window to supply dollars directly to the country's three big state-run oil companies. Here is how each piece fits together [3][4][5][6].

The numbers at a glance

• The rupee: ₹96.61 per US dollar on 9 October (RBI reference rate); all-time low of 96.96 in May 2026; down about 7% this year, its sharpest slide since 2013 [1].
• The reserves: From a lifetime high of $785.71 billion (week ended 4 September) to $734.61 billion (week ended 2 October). The week ended 25 September saw a record single-week fall of $18.34 billion [1].
• The buffer: Reserves cover roughly 11 months of imports, as the Governor noted in June, India's traditional adequacy benchmark [6].
• The rank: India overtook Russia in September to become the fourth-largest reserve holder globally, behind China, Japan and Switzerland [1].
• The response: Repo rate raised to 5.50% (7 October, first hike in about three years); currency-derivative rules tightened (9 October); dollars to be sold directly to IOC, HPCL and BPCL from 12 October, until further notice [3][4][5].

Why the rupee has been under pressure

The rupee's slide in 2026 has three broad drivers, and the RBI's own monetary policy resolution, released after the 5-7 October meeting, names the first of them squarely:[3]

"The re-escalation of the conflict in West Asia and the consequent sharp volatility in crude oil prices has kept the global economy in a state of flux."

• Crude oil and the West Asia conflict. Oil is India's largest import, so costlier crude swells the import bill and increases the demand for dollars to pay for it. The RBI's working assumption for crude in the second half of 2026-27 is $95 a barrel [3].
• A stronger dollar and global interest-rate conditions. When the US and other major economies hold rates higher, global money tends to move toward dollar assets, and emerging-market currencies face the pull. The RBI's October hike was, in effect, India joining a global wave of tighter or "higher-for-longer" policy [3].
• Portfolio outflows. Foreign portfolio investors have been net sellers of Indian equities through 2026, reflecting both global risk aversion and the same geopolitical uncertainty, adding a steady supply of dollars heading out [7].

What depreciation actually means. A weaker rupee is not simply "bad news": it is a redistribution. A ₹100 imported product costs more in rupees; foreign travel, overseas education, and any dollar-denominated expense become pricier. On the other side, exporters who earn in dollars find their rupee revenues rise, and families receiving remittances get more rupees per dollar. The worry for policymakers is the mix: India's imports (especially oil) outweigh its exports, so a sustained, disorderly slide feeds into domestic prices through the import bill [3].

The reserves rollercoaster: down, a record surge, down again

The movement in reserves through 2026 tells the story of the RBI's changing tactics, in both directions.

The drawdown of May. During the earlier escalation in West Asia, the RBI sold dollars from its reserves to steady the rupee. By the week ended 22 May, reserves had slipped to $681.4 billion, a more-than-one-year low, and the rupee was hitting record levels of weakness [1].

The swap window of June. On 5 June, the RBI opened a concessional swap facility to deliberately pull dollars into the country. Under it, banks that brought in dollars through FCNR(B) deposits (foreign currency non-resident bank deposits), external commercial borrowings (ECBs) and overseas foreign currency borrowings (OFCBs) could swap them with the RBI at a preferential rate. The dollars came to the RBI, which paid rupees now and committed to return the dollars later [6].

The numbers were extraordinary. By 31 August, the facility had drawn $136.38 billion, $127.23 billion through FCNR(B) deposits alone, and the FCNR(B) window closed a month ahead of its 30 September deadline because inflows ran so hot [6].

The record surge. The reserves rose for ten straight weeks. In the week ended 4 September, they jumped $44.9 billion, the largest weekly gain ever (more than two-and-a-half times the previous record set in August 2021), to a lifetime high of $785.71 billion. India overtook Russia into fourth place among the world's reserve holders [1].

The reversal. Then came four consecutive weekly declines as the rupee came under renewed pressure and the RBI stepped back into the market, selling dollars to slow the fall. The week ended 25 September saw the biggest weekly drop on record: $18.34 billion, down to $747.56 billion. A further $12.95 billion went out in the week ended 2 October, leaving reserves at $734.61 billion, a level the Governor himself cited in his 7 October statement [1][2].

One nuance matters for anyone reading the headline numbers: for all the volatility, reserves are still above where they stood a year earlier, and the September peak itself was engineered partly by policy: dollars borrowed in through the swap window rather than earned through trade surpluses [6].

The fine print of the swap window

The swap window was effective: reserves rose, and the rupee had a deeper buffer. But it was not free money, and the RBI's own disclosures make the structure visible.

• The dollars must return. FCNR(B) deposits are term deposits by non-resident Indians at Indian banks; the banks must repay them in dollars when the deposits mature, from 2029 onwards for the June batch. The RBI's swap commitment to return dollars acts as the mirror of the inflows [6].
• The forward book shows the obligation. The RBI's net short position in the forward market (dollars it has promised to deliver in future) climbed to a record of about $137 billion by end-June. That is the accounting footprint of the swap: dollars received today, dollars owed tomorrow [6].

In other words, part of the September spike borrowed from the future. That does not make it unwise (a bigger buffer in a turbulent year had real value), but it does mean the drawdown that followed was partly a reversal of a policy-driven inflow, not purely a signal of fresh stress.

The new defence: a hike, tighter rules, and a dollar window for oil

With the rupee again pressing against record lows in October, the RBI moved on three fronts in a single week.

1. A rate hike (7 October). The Monetary Policy Committee raised the repo rate by 25 basis points to 5.50%, shifting its stance to "calibrated tightening", and raised its FY27 inflation forecast to 5.2% while projecting GDP growth at 7.1% [3]. Higher domestic rates improve the returns on rupee assets relative to dollar assets, one of the classic tools against currency pressure, and the hike also responds to the inflation the weak rupee and costlier crude are importing [3].

2. Tighter currency-derivative rules (9 October). The RBI issued two circulars to curb what it regards as speculative froth in the forex market. The key measures: authorised dealers may no longer let users re-book foreign exchange derivative contracts involving the rupee that have been cancelled (rollovers at maturity are still allowed); the threshold for taking foreign exchange derivative positions without establishing an underlying exposure was cut from $100 million to $5 million; users must now certify that the same exposure has not been hedged with another dealer; and a Foreign Exchange Risk Reserve of 20% must be maintained on large (above $2 million) rupee-derivative positions hedging current-account exposures. The stated aim: to "strengthen market discipline and ensure appropriate risk management in the foreign exchange market, while maintaining an orderly and transparent market environment" [4].

3. A direct dollar window for oil companies (10 October). Public-sector oil marketing companies, Indian Oil, HPCL and Bharat Petroleum, are among the largest daily buyers of dollars in India, because crude is bought in dollars. From 12 October, the RBI will meet their "entire daily dollar requirements" itself, selling them dollars through designated banks, "until further notice" [5].

Why the oil window matters, in one example. When IOC or HPCL buys dollars in the open market to pay for a crude shipment, that purchase itself pushes the rupee down. By supplying those dollars directly from the reserves, the RBI keeps the oil companies' demand out of the spot market, easing the pressure at the margin without those transactions cascading into the rupee's daily price [5].

What it means for households

The rupee's level and the RBI's defence reach ordinary lives in several ways:

• Overseas education, travel and any dollar expense. At ₹96.61 to the dollar, a $40,000 annual tuition bill converts to roughly ₹38.6 lakh. At the rupee's level at the start of the year, the same bill would have cost about ₹36 lakh, nearly ₹2.6 lakh less (figures illustrative) [1].
• Remittances. A family receiving $1,000 a month gets about ₹96,600 at current levels, over ₹6,000 a month more than at the start of 2026 (figures illustrative) [1].
• Imported goods and inflation. Costlier oil and imported inputs work their way into transport and retail prices, the second-round channel the MPC flagged when it raised the inflation forecast and the repo rate [3].
• Depositors. Higher policy rates have lifted term-deposit returns, and the FCNR(B) swap window was designed in part to make dollar deposits by NRIs more attractive, a rare corner of the system that benefits from the pressure [3][6].

Where things stand

• The rupee is holding just above its May record low, with the RBI intervening and supplying oil companies' dollars directly from 12 October [1][5].
• Reserves stand at $734.61 billion, down over $50 billion from the September peak, but still the fourth-largest stock in the world and covering roughly 11 months of imports [1][6].
• Policy is now working on three levers at once: interest rates, derivative-market rules, and direct dollar supply, a defence stack rather than a single move [3][4][5].
• What to watch: crude prices (the RBI assumes $95 a barrel), the course of foreign portfolio flows, and whether the oil-company window, together with the derivative curbs, breaks the rupee's slide towards its record low [3][7].

Quick answers

Why are India's forex reserves falling? The RBI is selling dollars from its reserves to defend the rupee, which has been pressured by the West Asia conflict and volatile crude prices, a strong dollar and foreign portfolio outflows. In the four weeks to 2 October, reserves fell nearly $51 billion from their September peak [1][2][3][7].

How big was the record weekly drop? In the week ended 25 September 2026, reserves fell $18.34 billion to $747.56 billion, the largest single-week decline on record. The following week they fell another $12.95 billion, to $734.61 billion [1].

Why did reserves hit a record high in September? The RBI's concessional swap window, opened on 5 June, drew $136.38 billion of dollars through FCNR(B) deposits, ECBs and OFCBs by 31 August. Reserves rose for ten weeks, including a record $44.9 billion weekly gain in the week ended 4 September, reaching a lifetime high of $785.71 billion [1][6].

What is the FCNR(B) swap window? A facility under which banks that brought in dollars via FCNR(B) deposits (dollar deposits by non-resident Indians), ECBs or OFCBs swapped them with the RBI at a concessional rate. The RBI received dollars immediately, boosting reserves, while committing to return them later, which is why its forward-market obligations rose to a record ~$137 billion [6].

What has the RBI announced this October? Three things: a 25 bps repo hike to 5.50% with a "calibrated tightening" stance (7 October); tighter currency-derivative rules, including a ban on re-booking cancelled rupee derivative contracts and a Foreign Exchange Risk Reserve of 20% on large positions (9 October); and a special window meeting the entire daily dollar needs of IOC, HPCL and BPCL from 12 October [3][4][5].

What does a weak rupee mean for students and families? Every dollar expense, from foreign tuition and travel to imports, costs more in rupees; a $40,000 tuition bill is about ₹2.6 lakh costlier than at the start of 2026. Families receiving remittances gain, and FCNR(B) deposit rates have been made more attractive for NRIs [1][6].

Sources

1. Reserve Bank of India: Weekly Statistical Supplement (foreign exchange reserves) and FBIL reference exchange rates, September-October 2026. rbi.org.in
2. Reserve Bank of India: Governor's Statement, 7 October 2026 (Press Release; "As on October 2, 2026, India's forex reserves stood at US$ 734.6 billion"). rbi.org.in
3. Reserve Bank of India: Monetary Policy Statement, 2026-27, Resolution of the Monetary Policy Committee, 5-7 October 2026. rbi.org.in
4. Reserve Bank of India: "RBI Announces Regulatory Measures for the Foreign Exchange Market", 9 October 2026 (A.P. (DIR Series) Circulars No. 25 and 26; Press Release 2026-2027/1305). rbi.org.in
5. Reserve Bank of India: "RBI announces special window for Public Sector Oil Marketing Companies to meet dollar requirements", 10 October 2026 (Press Release 2026-2027/1306). rbi.org.in
6. Reserve Bank of India: Swap facility data on forex inflows via FCNR(B) deposits, ECBs and OFCBs; and the RBI's announcement and disclosures on the concessional swap facility (June 2026). rbi.org.in
7. National Securities Depository Limited (NSDL): FPI investment data, 2026. fpi.nsdl.co.in