Forex reserves, RBI intervention and capital-flow volatility

Detail

1. What forex reserves are

• Foreign exchange reserves are the external assets held by the RBI. They are foreign money and near-money that the country can use to pay for imports, repay foreign debt or support the rupee.
• Where they come from: reserves grow when the BoP (balance of payments, the record of all money flows between India and the rest of the world) shows a surplus, which means more dollars come in than go out. RBI buys those extra dollars. When there is a BoP deficit, RBI sells reserves to fill the gap.
• Official reserve transactions are the "balancing item" of the BoP:
• Overall BoP balance = Current account balance + Capital account balance

• If this is negative, reserves fall by the same amount. If it is positive, reserves rise.

• How the job changed over time:

• Bretton Woods (1944–1971): exchange rates were fixed to the dollar. The dollar was fixed to gold. Central banks needed reserves to hold the fixed rate.
• 1991 BoP crisis: India's reserves could pay for only about two weeks of imports. This forced the IMF loan, devaluation and the LPG reforms (Class 11).
• Managed float today: market forces set the rupee. The RBI steps in only to calm too much volatility. It does not defend any fixed level.

2. Composition (four parts, from RBI's Weekly Statistical Supplement)

Component	Meaning	Value (31 March 2026)
Foreign currency assets (FCA), the largest part	Dollar, euro, pound and yen deposits and bonds (mainly US Treasuries). Reported in US$, so it also includes gains or losses when non-dollar currencies move against the dollar.	US$552.28 bn [2]
Gold	RBI's gold holdings valued at market price	US$115.40 bn [2]
SDRs (Special Drawing Rights, the IMF's own reserve asset, based on a basket of five currencies)	Allotted by the IMF to member countries	US$18.62 bn [2]
Reserve tranche position (RTP) with the IMF	The part of India's IMF quota paid in hard currency. India can draw it at any time, with no conditions.	US$4.81 bn [2]
Total		US$691.11 bn [2]

• Worked example (share of each part): FCA share = 552.28 ÷ 691.11 ≈ 80%. Gold share = 115.40 ÷ 691.11 ≈ 16.7% (31 March 2026) [2].
• A 2021 PIB note still counted only three parts: gold, SDRs and FCA. The scaffold's four-part list adds RTP [7].

3. Why reserves are held (purposes)

• Financing BoP gaps. Class 11 says reserves are kept "to import petroleum and other important items".
• Intervening in the forex market. RBI sells dollars when the rupee falls too fast and buys dollars when the rupee rises too fast.
• Insurance against sudden stops. If foreign money suddenly leaves, reserves pay the bills until things settle.
• Market confidence and credit ratings. Large reserves tell investors and rating agencies that India can always pay its foreign debt. This lowers India's borrowing cost.

4. How much is "enough"? Adequacy metrics

(a) Import cover

• Formula: Import cover (months) = Forex reserves ÷ Average monthly imports
• Old rule of thumb: 3 months.
• Scaffold: about 11 months. Latest data:
• 10.8 months at end-December 2025

• down from 11.3 months at end-September 2025 [2]

• Past high: more than 18 months (2021) [7].

• Worked example: reserves of US$690 bn and imports of US$64 bn a month → 690 ÷ 64 ≈ 10.8 months.
• For comparison, in 1991 cover was about half a month (two weeks).

(b) Reserves to short-term debt (Greenspan-Guidotti rule)

• Short-term debt is foreign debt that must be repaid within one year.
• Rule: reserves should be at least 100% of short-term debt. Then the country can repay a full year of maturing debt even if no new foreign loans come in.
• India's data is shown the other way round, as short-term debt ÷ reserves:
• 21.9% at end-December 2025

• up from 19.7% at end-September 2025 [2]

• Worked example: if short-term debt ÷ reserves = 21.9%, then reserves ÷ short-term debt = 1 ÷ 0.219 ≈ 457%. This is well above the 100% rule.

(c) Volatile capital flows to reserves

• Volatile capital flows means foreign portfolio investment (money in shares and bonds) plus short-term debt, which can leave quickly.
• Ratio of volatile capital flows to reserves:
• 69.1% at end-December 2025

• up from 66.1% at end-September 2025 [2]

• A rising ratio means reserves cover less of the money that could leave suddenly.

(d) IMF ARA metric (Assessing Reserve Adequacy)

• A weighted mix of four risks: exports (export earnings can fall), broad money (residents may move savings abroad), short-term debt and other liabilities (such as portfolio holdings).
• The usual comfort range is 100–150% of the metric.

5. Gold reserves

• Why hold gold: it hedges against currency risk (the dollar can lose value) and sanctions risk. Gold kept at home cannot be frozen by a foreign government.
• Holdings: 880.52 tonnes (31 March 2026) [2] (NCERT scaffold: about 880 tonnes).
• Held in India: 680.05 tonnes [2]

• With the Bank of England and the BIS (Bank for International Settlements): 197.67 tonnes [2]

• Repatriation: about 100 tonnes were brought back from the Bank of England in 2024.

• Buying: RBI has bought gold steadily in recent years. In November 2009 it bought 200 tonnes from the IMF [8]. Earlier, RBI's holding was only about 397.5 tonnes [8].
• 1991 link: in the 1991 crisis India pledged gold abroad to raise emergency money. This is one reason gold is politically sensitive.

6. Trajectory

Period	Reserves
1991 (crisis)	Enough for only about 2 weeks of imports
2023-24	US$646 bn (NCERT)
September 2024	Peak of about US$705 bn
End-September 2025	US$700.09 bn [2]
31 March 2026	US$691.11 bn [2]

• The drawdowns after the 2024 peak came as the RBI sold dollars to defend the rupee. Valuation changes also play a part, because FCA and gold are reported in dollars.
• Net forward position was US$103.06 bn (31 March 2026) [2].
• Forward means a contract to buy or sell dollars on a future date.
• Headline reserves do not show these future dollar commitments. So analysts look at the forward book too when judging how many reserves RBI can really use.

7. How RBI intervenes

• Spot intervention. RBI sells dollars to banks and takes back rupees, so the rupee rises (or falls less). Buying dollars does the opposite.
• Forward intervention. RBI promises to sell or buy dollars in the future. This steadies expectations today without using reserves right away.
• USD/INR buy-sell swaps:
• RBI buys dollars now and agrees to sell them back later → it injects rupee liquidity now and builds forward cover.

• A sell-buy swap does the reverse and drains rupees.

• Managed float principle: RBI says it targets no fixed level of the rupee. It acts only to curb excessive volatility.

8. Costs of holding reserves

(a) Sterilisation

• Sterilisation means cancelling out the effect of forex intervention on the rupee money supply:
• RBI buys dollars → it pays in new rupees → more money in the system → risk of inflation
• To stop this, RBI mops up the extra rupees through OMOs (open market operations, selling government bonds to banks) or MSS bonds (Market Stabilisation Scheme securities, issued only to absorb extra liquidity).

• Interest on these bonds is a direct cost.

• Worked example: RBI buys US$1 bn at ₹85/$ → ₹8,500 crore enters the banks. RBI sells ₹8,500 crore of MSS bonds at 6.5% → yearly cost ≈ ₹552 crore.

(b) Negative carry

• Negative carry is the gap between what reserves earn and what India pays on its own borrowing.
• Worked example: US$100 bn is held in US Treasuries at 4%. India's own borrowing costs about 7%. The 3% gap on US$100 bn = US$3 bn a year in lost income.
• RBI's custodian role is covered in banking-monetary-policy.

9. Kinds of capital-flow volatility

(a) Hot money

• Hot money is short-term speculative capital that moves quickly in search of returns and destabilises markets.
• FPI (foreign portfolio investment) flows into debt and equity can surge in and rush out.
• FDI (foreign direct investment in factories and firms) is "sticky" and moves slowly. FPI is not.

(b) Sudden stop

• A sudden stop is when capital inflows halt or reverse abruptly, forcing depreciation and output loss.
• Asia 1997: Thailand, Indonesia and Korea ran out of reserves when short-term foreign loans were pulled out.
• 2013 taper tantrum:
• The US Fed hinted it would taper (slow down) its bond purchases → US interest rates rose → FPIs pulled money out of emerging markets.
• India was among the "Fragile Five" (with Brazil, Indonesia, Turkey and South Africa). These were countries with high current account and fiscal deficits.
• The rupee fell to about ₹68.8/$ (August 2013).
• India's response: an FCNR(B) swap window that raised about US$34 bn, plus curbs on gold imports.
• The FCNR(B) window was announced on 6 September 2013 [5]. FCNR(B) deposits are Foreign Currency Non-Resident (Bank) deposits: foreign-currency deposits that NRIs hold in Indian banks.

• Banks could swap fresh FCNR(B) dollar deposits (minimum 3-year maturity, 1-year lock-in) with the RBI at a fixed cost of 3.5% a year, compounded half-yearly [5]. The RBI took the currency risk, so banks found it cheap to raise NRI dollars.

• March 2020 (Covid): FPIs sold heavily in emerging markets, and India saw large outflows.

(c) Capital flight

• Capital flight means large outflows driven by economic or political fear.
• Example: Sri Lanka 2022. Reserves ran out, the country defaulted on its debt and ran short of fuel and food. India gave support, including through the SAARC swap.

10. Lines of defence (in order)

1. Own reserves. This is the first line and is fully under India's control.
2. RBI USD/INR buy-sell swaps, which adjust liquidity and forward cover.

3. Currency swap arrangements. These are agreements between central banks to exchange currencies for a set period, giving liquidity in times of stress. - India-Japan Bilateral Swap Arrangement (BSA), US$75 bn:

   • Raised from the earlier US$50 bn [3]
   • Negotiated during the PM's visit to Tokyo on 29 October 2018
   • Approved by the Cabinet on 10 January 2019
   • Came into force on 28 February 2019 [3]
   • Renewed in March 2022 [4]
   • India can swap rupees for up to US$75 bn to keep the BoP stable or to meet short-term liquidity needs [3].
   • SAARC Currency Swap Framework, with India as the provider to Sri Lanka, the Maldives and Bhutan:
   • The 2024-27 framework was announced on 27 June 2024. It added a separate INR Swap Window with concessions for swaps in rupees [6].
   • Recent use: Bhutan's Royal Monetary Authority rolled over ₹15 billion (26 February 2026) and drew ₹25 billion more (23 March 2026). The Maldives Monetary Authority rolled over US$400 mn (23 October 2025) [2].
   • RBI-UAE arrangements, including a local-currency swap.

4. The IMF as lender of last resort. India drew on the IMF in 1991. RTP and SDRs are the part of reserves linked to the IMF.

Prelims Hooks

• The four parts of forex reserves, in order of size: FCA > Gold > SDR > Reserve Tranche Position (31 March 2026) [2].
• Import cover = reserves ÷ monthly imports. It was 10.8 months at end-December 2025 [2]. The old rule of thumb was 3 months, and in 1991 it was about 2 weeks.
• Greenspan-Guidotti rule: reserves ≥ 100% of short-term debt (debt due within one year).
• RBI held 880.52 tonnes of gold (March 2026), with 680.05 tonnes kept in India [2]. The foreign gold is held with the Bank of England and the BIS, not the US Fed.
• The India-Japan BSA is US$75 bn, raised from US$50 bn and in force since 28 February 2019 [3].
• SAARC swap framework: India is the lender, not a borrower. The 2024-27 framework added an INR Swap Window [6].
• Fragile Five (2013): India, Brazil, Indonesia, Turkey and South Africa. Trap: China and Russia were not in it.
• 2013 FCNR(B) swap: fixed swap cost 3.5%, and the deposits needed a minimum 3-year tenor [5]. It raised about US$34 bn.
• MSS bonds exist to absorb extra liquidity (sterilisation). They are not issued to fund the government's spending.
• The reserve tranche can be drawn without IMF conditions. It is part of reserves, not a loan.

Mains Points

• How big should reserves be?
• Large reserves protect India from sudden stops. The 2013 taper tantrum hit India hard. In 2022 and later, bigger reserves let the RBI sell dollars without panic.
• But reserves cost money. There is negative carry of about 3% a year on every dollar held, plus the interest cost of sterilisation.

• Use the ARA metric and the short-term-debt ratio, not only import cover, to argue for an "optimal" level rather than "the more the better".

• Impossible trinity (trilemma):

• A country cannot have a fixed exchange rate, free capital flows and independent monetary policy all at the same time.
• India manages this with a managed float, controls on some capital flows, and sterilisation.

• Heavy intervention to defend the rupee drains reserves and tightens rupee liquidity. It can also clash with the inflation-targeting goal.

• Better-quality capital flows:

• A rising ratio of volatile capital flows to reserves (69.1%, December 2025 [2]) shows that FPI and short-term debt risk is growing.

• Policy options: encourage FDI over FPI, deepen the rupee bond market, use the rupee more in trade, and bring gold home to reduce sanctions risk.

• Regional financial leadership:

• The SAARC swap support to Sri Lanka, the Maldives and Bhutan, together with the India-Japan BSA, is financial diplomacy.
• It builds a regional safety net beyond the IMF and supports the Neighbourhood First policy (GS-II link).