After liquidity management has ensured that the policy repo rate decided by the MPC is reflected in the money market, the shortest segment of the financial market continuum, the Reserve Bank of India dons a developmental and regulatory role so that the policy impulse is conveyed to the entire economy.

Only then can monetary policy impact aggregate demand in order to achieve the desired rate of inflation and growth.

In order to develop the channels through which this policy transmission will take place and to ensure that these ‘pipes’ function in a frictionless manner, the RBI is closely engaged in developing various segments of the market spectrum. The RBI also works towards developing synaptic interfaces between these segments so that policy impulses travel seamlessly from node to node without losing steam and power.

The RBI also invests deeply in developing financial institutions that specialise in various markets, instruments that cater to each market, including those that price and transfer risk, often called derivatives, and also in setting up benchmarks from which the various financial instruments can be priced and traded. Ensuring orderly market behaviour, trading timings and adherence to regulatory requirements also engages the RBI’s attention and resources.

All these aspects contribute to the smooth transmission of monetary policy.

Yet, even with the best efforts, some of it is lost in transmission because of market dynamics; the behaviour of institutions, especially how they minimise risk and maximise profits; missing markets and institutions; and sometimes due to disorderly conduct of activity. Like all central banks, the RBI has to endure these transmission losses and strive to ensure that they are minimised.

This is peacetime reality.

In the face of a crisis, however, when markets freeze due to extreme risk aversion and trading stops, central banks pole vault over the market spectrum and convey the policy stance directly at the long end of the market spectrum and to economic agents. It is called unconventional monetary policy.

Channels of Transmission

Monetary policy transmission has fascinated economists and finance academics, leading them to try to understand how this transmission actually takes place. This has led to attempts to disentangle various possible channels by which this transmission could be occurring.

The interest rate channel is the primary mechanism through which the policy rate impacts short-term rates, which influence longer-term rates, the cost of borrowing, saving and investment, aggregate demand and economic activity. When the central bank changes the policy rate, commercial banks pass these changes on to the public by adjusting their short- and long-term interest rates for loans, mortgages, and deposits.

Higher interest rates, for instance, increase the cost of borrowing and reward saving, causing consumers to reduce large purchases and businesses to delay capital investments. Conversely, lower rates stimulate borrowing and spending. This shift in overall spending alters aggregate demand, which subsequently brings the inflation rate up or down.

The credit channel works through the supply and terms of bank loans. It amplifies the impact of central bank policy rates by altering the availability and cost of credit. It functions through two main mechanisms: the bank lending channel, which affects credit supply, and the balance sheet channel, which affects borrower creditworthiness. 

The bank lending channel focuses on the supply of loans from commercial banks. When the central bank raises rates, bank reserves become costlier, and hence banks may choose to reduce them by restricting lending rather than simply raising interest rates, thereby decreasing investment and consumption.

Of course, well-capitalised banks can often buffer these shocks and keep credit flows unchanged, in contrast to banks with high non-performing assets. This is why the amount and quality of capital in the banking system becomes crucial to the functioning of the credit channel of monetary policy transmission.

The balance sheet channel is about how the policy rate change affects borrowers’ financial position, such as a firm’s net worth. To illustrate, tight monetary policy lowers equity and asset prices. This reduces the net worth of borrowing firms, meaning they have less collateral to offer. Moreover, when borrowers have lower net worth, creditworthiness may be questioned. Banks charge a higher premium or deny the loan entirely. This makes it harder for businesses to fund capital expenditures.

The exchange rate channel works by altering the external value of a currency. When the RBI raises its policy rate, domestic assets offer higher yields. This attracts global capital, appreciating the value of the rupee against foreign currencies.

A stronger currency makes domestic exports more expensive and imports cheaper. As net exports are a component of the gross domestic product, a drop in net exports lowers overall economic demand. This reduction in demand cools down the economy and helps reduce inflation.

The asset price channel influences the broader economy by altering the prices of assets like equities, bonds, and real estate. These price fluctuations alter household wealth and the cost of capital, ultimately shifting aggregate demand, consumption, and inflation. This channel operates through two primary pathways. When the policy rate is lowered, for instance, borrowing costs fall, and the present discounted value of future income streams rises. This stimulates investor demand for alternative assets, driving up the prices of shares and real estate.

For households, higher asset values increase overall net worth or wealth, leading to increased consumer spending and reduced saving rates. Conversely, rate hikes deflate asset values, inducing a "negative wealth effect" that cools down consumer spending. Monetary policy also affects corporate investment through market valuations, or what is called Tobin's q. When expansionary monetary policy pushes up equity prices, a company’s market value increases relative to the cost of replacing its physical capital. In this scenario, firms can issue shares to finance new investments at a low relative cost, triggering an increase in business investment.

The policy rate also heavily influences housing markets. Lower policy rates reduce mortgage costs, driving up property values. This appreciation increases the collateral value (equity) that households and businesses hold. As banks lend against collateral, higher equity enables easier access to credit, further boosting aggregate demand.

The expectations channel operates when monetary policy actions and communication shape the public's beliefs about future inflation and interest rates. This influences household spending, business pricing, and financial market decisions today. When households and businesses believe the central bank will successfully stimulate or cool the economy, they adjust their current spending and saving behaviours accordingly. If businesses and workers expect higher future inflation, firms may raise prices preemptively, and workers may demand higher wages.

The central bank’s promise to tighten policy curbs these anticipations, preventing a self-fulfilling wage-price spiral. Longer-term interest rates such as fixed mortgages or 10-year government bonds are heavily influenced by the anticipated average of future short-term rates. If the central bank signals long-term commitment to controlling inflation, long-term borrowing costs adjust immediately, even before short-term policy rates change. Central banks also utilise forward guidance, which is statements about the future path of policy rates, to align market psychology with their macroeconomic goals.

The effectiveness of the expectations channel relies fundamentally on central bank credibility and transparency. If the public trusts the monetary authority, they adjust their behaviour immediately, making the policy far more potent. Conversely, if credibility is lost, the expectations channel can break down, requiring more drastic, tangible policy changes to alter economic trajectories.

In real life, however, all these channels are at work together, and it is very difficult, if not impossible, to disentangle or separate their functioning.

This is Part 11 of the Masterclass with Michael Patra.

Masterclass with Michael Patra: Previous Sessions

Part 1
Origins, Ideas and Institutions
Michael Patra begins the masterclass by tracing how central banks evolved from fragile monetary experiments into institutions entrusted with preserving trust, stability and confidence.

Part 2
RBI and the Safeguarding of Confidence
The series then turns to the RBI’s evolution, its expanding institutional role, and the balance between autonomy, growth and price stability.

Part 3
The Rise and Fall of Monetary Policy Regimes
From Bretton Woods to monetary targeting, the masterclass examines how central banks repeatedly reinvented monetary policy frameworks when old anchors collapsed.

Part 4
When Monetary Anchors Collapse
As monetary targeting broke down globally, central banks were pushed again into uncertainty, instability and regime change.

Part 5
Central Banking and Monetary Policy Regimes: The Indian Experience
How India’s trysts with crises, policy responses and changing gears in the development strategy imposed monetary policy regime shifts upon the RBI.

Part 6
Inflation Targeting and the Contract of Trust
From time inconsistency to flexible mandates, Michael Patra explains how inflation targeting became the world’s most durable monetary policy regime.

Part 7
India: Survival of the FITtest
From the Urjit Patel committee to the first MPC, Michael Patra traces how India designed, legislated and launched flexible inflation targeting.

Part 8
Lessons From India’s Inflation Targeting Decade
After a decade tested by a pandemic and war, Michael Patra distils four lessons from India’s flexible inflation-targeting framework. 

Part 9
The Plumbing in the Monetary Policy Architecture
Patra explains the plumbing of monetary policy, tracing how RBI liquidity management transmits the MPC’s repo rate through banks and money markets.

Part 10
How the RBI Manages Liquidity, From the LAF Corridor to Sterilisation and Beyond
Michael Patra explains how the RBI manages liquidity, from sterilisation and CRR operations to forecasting and the LAF corridor’s role in transmission.