Central bank uses sell-buy dollar-rupee swaps to absorb excess cash from the banking system as strong foreign capital inflows and elevated oil prices add to liquidity and inflation concerns

The Reserve Bank of India (RBI) has conducted dollar-rupee currency swaps worth at least $10 billion over the past two weeks as it steps up efforts to absorb surplus liquidity from the financial system.

According to people familiar with the developments, the central bank has carried out a series of sell-buy swaps with banks, with maturities ranging from one month to around six months. The transactions are aimed at removing excess rupee liquidity from the banking system at a time when lenders are holding unusually large cash balances.

The RBI's latest operations come against the backdrop of exceptionally strong foreign capital inflows into India. The resulting increase in banking-system liquidity has pushed short-term borrowing costs lower and could complicate the central bank's efforts to manage inflationary pressures.

How RBI's Currency Swap Works

Under a sell-buy dollar-rupee swap, the RBI sells US dollars to banks in exchange for rupees.

The transaction is structured so that the RBI agrees to buy the dollars back at a predetermined future date. While the foreign exchange position is reversed at maturity, the immediate effect is to remove rupees from the banking system.

In simple terms, banks hand over rupees to the central bank and receive dollars temporarily. This reduces the amount of rupee cash available for lending and investment in the financial system.

The RBI can use such operations as a liquidity-management tool without permanently changing the country's foreign exchange reserves.

Currency Swaps Have Become Larger

The scale of the latest swaps is notable because they are larger than similar publicly announced operations conducted by the RBI over recent years.

The central bank has typically conducted public currency-swap auctions in individual tranches of around $3 billion to $5 billion.

The latest activity, however, is understood to have reached at least $10 billion across multiple transactions, reflecting the unusually large liquidity surplus that the RBI is currently attempting to manage.

Market participants are also watching pricing in forward dollar-rupee contracts. Rates for contracts maturing between three and six months have risen during September, reflecting increased activity and demand associated with the central bank's operations.

Banking System Liquidity Hits Extremely High Levels

Indian banks have been dealing with a substantial surplus of liquidity following strong foreign capital inflows.

The RBI's measures aimed at attracting foreign capital have resulted in inflows of more than $140 billion, significantly exceeding earlier official expectations.

The resulting surplus banking liquidity reportedly reached around ₹11 trillion, or approximately $115 billion, earlier this month.

Such a large liquidity surplus can push short-term interest rates lower because banks have more funds available than they immediately need.

While abundant liquidity can support credit availability and financial-market activity, excessive cash in the system can also complicate monetary-policy transmission and create additional inflationary risks.

Why the RBI Is Draining Excess Cash

The central bank's liquidity management has become particularly important because the Indian economy is also facing pressure from elevated crude oil prices.

Higher oil prices can increase India's import bill and contribute to inflationary pressure. If excess domestic liquidity remains very high at the same time, the combination can make the inflation environment more challenging.

The RBI therefore needs to balance two objectives: ensuring that the financial system has enough liquidity to function smoothly while preventing an excessive surplus from driving short-term rates too low or adding to inflationary pressures.

Currency swaps provide one way of achieving this balance.

Bond Sales and Other Liquidity Tools Also in Use

The RBI is not relying solely on currency swaps to manage the liquidity surplus.

The central bank has also been using government bond sales and other liquidity-management operations.

The latest measures come after the RBI absorbed ₹75,026 crore through an overnight variable rate reverse repo-style operation amid surplus liquidity in the banking system.

Together, these instruments allow the central bank to influence the amount of cash available to financial institutions without necessarily making broad changes to its policy rate.

Foreign Capital Inflows Create a Liquidity Challenge

The unusually large liquidity surplus is partly linked to India's ability to attract foreign capital.

Foreign investment inflows bring dollars into the country. When these flows are converted into rupees, they can increase domestic liquidity unless the central bank subsequently absorbs the additional rupee funds.

This creates a policy challenge for the RBI.

On one side, foreign inflows support India's external financing position and can strengthen confidence in domestic financial markets. On the other, large and rapid inflows can create a significant increase in rupee liquidity.

The RBI's recent currency swaps indicate that liquidity management has become an important part of responding to this situation.

Economist Estimates More Swaps Could Be Involved

Gaura Sen Gupta, chief economist at IDFC First Bank, said the RBI has been managing the liquidity build-up through a combination of bond sales and sell-buy swaps.

She estimated that without these measures, the banking-system liquidity surplus could have reached around ₹15.5 trillion.

Sen Gupta estimated that the RBI may have conducted around $10 billion to $15 billion of sell-buy swaps with maturities falling within the financial year ending March 31.

The estimate highlights the potential scale of the central bank's intervention as it attempts to keep excess liquidity under control.

Impact on Banks and Money Markets

For banks, changes in system liquidity can directly influence the availability and cost of short-term funds.

When liquidity is abundant, banks generally have less need to borrow from the money market, which can put downward pressure on short-term interest rates.

If the RBI progressively absorbs the surplus, money-market conditions could become tighter and borrowing costs may move higher from exceptionally low levels.

The impact will depend on the pace and scale of future liquidity operations as well as the continued flow of foreign capital into India.

Currency Market Implications

The swaps also have implications for the foreign exchange market.

By temporarily selling dollars to banks, the RBI provides dollar liquidity to the banking system while simultaneously absorbing rupees.

The arrangement allows the central bank to manage domestic liquidity while retaining the ability to reverse the transaction at maturity.

This makes currency swaps a flexible instrument, particularly during periods when foreign exchange flows and domestic liquidity conditions are changing rapidly.

Inflation Remains an Important Consideration

The RBI's liquidity operations are also being viewed against the backdrop of inflation risks from higher commodity prices.

Crude oil is particularly important for India because the country imports a substantial share of its energy requirements. A sustained rise in global oil prices can increase transportation and production costs and put pressure on domestic inflation.

Excess liquidity can add another layer of complexity if it contributes to stronger credit growth or demand.

The RBI's efforts to absorb surplus cash therefore form part of a broader strategy to maintain orderly financial conditions while monitoring inflation.

What Banks and Investors Will Watch

Markets will closely monitor the scale and frequency of future RBI liquidity operations.

Key factors will include the pace of foreign capital inflows, the size of the banking-system liquidity surplus, short-term money-market rates and the movement of crude oil prices.

Investors will also watch whether the RBI continues to combine currency swaps with bond sales and other liquidity-management measures.

Any significant change in the central bank's approach could affect bond yields, bank funding conditions, currency-market dynamics and broader financial-market liquidity.

Market Outlook

The RBI's latest currency swaps underline the scale of the liquidity surplus currently present in India's financial system.

With at least $10 billion of sell-buy swaps conducted over the past two weeks and estimates pointing towards potential operations of $10 billion-$15 billion within the current financial year, liquidity management has emerged as an important policy focus.

For financial markets, the key variables will be the pace of foreign capital inflows, RBI liquidity operations, crude oil prices and inflation expectations. A gradual absorption of excess cash could help maintain more balanced money-market conditions, while a sudden change in capital flows or commodity prices could require further policy intervention.

The RBI's combination of currency swaps, bond sales and other liquidity tools is therefore likely to remain an important feature of India's financial-market landscape in the months ahead.