FRM Exam Part II · Monetary and Fiscal Policy: Safeguarding Stability and Trust

Conventional Monetary Policy Tools for FRM Part II

Updated 11 October 2026 · Fact-checked

Conventional monetary policy tools are the policy interest rate, open market operations, reserve requirements and standing facilities. The central bank uses them to steer short-term money market rates and system liquidity. To solve questions, identify whether liquidity is added or drained, then trace the effect on the short rate, then on lending and the economy.

Understand Conventional Monetary Policy Tools

A central bank sits at the centre of the money market. Commercial banks hold reserve balances at the central bank and settle payments with them. Because the central bank is the sole issuer of those reserves, it can control how scarce or plentiful they are. That control is what lets it steer the short-term interest rate.

The policy interest rate is the headline rate the central bank wants in the overnight interbank market. Examples are the federal funds target range, the ECB deposit facility rate, and the repo rate in India. The central bank does not set every market rate. It sets the target and uses the other tools to keep the market rate close to it.

Open market operations (OMOs) are purchases and sales of securities, or repo and reverse repo transactions, by the central bank. When it buys securities or lends against collateral, it creates reserves and adds liquidity, which pushes short rates down. When it sells securities or borrows against them, it drains reserves and pushes rates up. Note the direction in a repo: from the central bank's view, a repo injects cash and a reverse repo absorbs cash. Terminology differs by country. In India, the repo rate is the rate at which the RBI lends to banks, and the reverse repo is where it absorbs liquidity.

Reserve requirements set the minimum share of deposits a bank must hold as reserves. Raising the ratio reduces the funds banks can lend and tightens conditions. Lowering it does the opposite. It is a blunt tool, so many central banks use it rarely or have set it to zero.

Standing facilities let banks borrow from or deposit with the central bank at preset rates on their own initiative. The lending facility rate acts as a ceiling on the overnight rate, because no bank pays more than it can borrow for from the central bank. The deposit facility rate acts as a floor, because no bank lends below what the central bank pays. Together they form a corridor. In a floor system with ample reserves, the central bank mainly moves the interest rate paid on reserves. Transmission then runs from the policy rate to money market rates, bank lending and deposit rates, asset prices, the exchange rate, and finally demand and inflation, with lags.

Key formulas to remember

Interest rate corridor: Deposit facility rate ≤ overnight market rate ≤ Lending facility rate; Standing facilities set the floor and ceiling. The policy rate usually sits inside the corridor, often near the middle.
Corridor width: Width = Lending facility rate − Deposit facility rate; A narrower corridor gives tighter control of the overnight rate. Quote the width in basis points (1 bp = 0.01%).
Required reserves: Required reserves = Reserve ratio × Reservable deposits; Excess reserves = Actual reserves − Required reserves.
Simple deposit multiplier (textbook): Multiplier = 1 ÷ Reserve ratio; An upper-bound illustration only. It assumes no cash leakage and no excess reserves, so real-world expansion is smaller.
OMO direction rule: Buy securities / repo → reserves up → short rate down. Sell securities / reverse repo → reserves down → short rate up; Reverse repo terms are from the central bank's side when it absorbs cash.

How to solve Conventional Monetary Policy Tools questions

Use the same chain of logic for any question on conventional tools. It keeps the direction of effects straight under pressure.

1Identify the goal: is the central bank easing or tightening, and is the problem about the rate level or the amount of liquidity?
2Name the tool in the question: policy rate, OMO, reserve requirement or standing facility.
3Work out the effect on reserves: does the action add reserves or drain them? Check who is the lender in any repo.
4Trace the effect on the overnight rate. Remember the corridor: the rate cannot sit long outside the floor and ceiling.
5Follow the transmission: money market rates, bank lending and deposit rates, asset prices, exchange rate, then demand and inflation.
6Do any arithmetic needed: required reserves, corridor width, or the simple multiplier, keeping units in basis points or the correct currency.
7Check the answer against the stated conditions, such as ample reserves or scarce reserves, before choosing.

Quickest way: Direction-and-corridor shortcut

When to use it: Use it for scenario MCQs asking what happens to rates or liquidity after a central bank action.

Ask: does this action add or remove reserves? Adding means rates fall, removing means rates rise.
Locate the floor and ceiling. If the question gives them, the market rate must lie between them.
Eliminate options that reverse the direction or place the market rate outside the corridor.
For reserve requirement questions, higher ratio means less lending capacity. Compute reserves as ratio × deposits.
Pick the option that states the full chain, not just the first link.

Common mistakes in Conventional Monetary Policy Tools

Confusing repo and reverse repo direction.
The names flip depending on whose view you take, and countries use them differently.
Fix: Ask who receives cash. If the central bank lends cash against collateral, it is a repo for the central bank and adds liquidity. If it absorbs cash, it drains liquidity.
Saying the central bank directly sets all market interest rates.
Headlines say the bank 'sets rates', which hides the mechanism.
Fix: State that it sets the policy rate and steers the overnight rate with OMOs and facilities. Longer rates reflect expectations and term premia too.
Treating the ceiling and floor of the corridor the wrong way round.
Students mix up the lending and deposit facilities.
Fix: Banks borrow at the lending rate, so it caps the market rate. Banks deposit at the deposit rate, so it is the floor.
Applying the money multiplier 1 ÷ reserve ratio as an exact result.
Textbook examples hide the assumptions.
Fix: Call it an upper bound that assumes no cash leakage and no excess reserves. Many modern systems steer rates without it.
Assuming a rate cut always raises lending immediately.
Students skip transmission lags and bank balance-sheet limits.
Fix: Mention lags, credit demand, bank capital and risk appetite. Transmission is uncertain, not mechanical.
Mixing up OMOs with quantitative easing.
Both involve buying securities.
Fix: Conventional OMOs target the short-term rate through routine liquidity operations. QE is an unconventional large-scale purchase programme when rates are near the lower bound.

Worked examples

Example 1

A central bank sets its lending facility rate at 4.25% and its deposit facility rate at 3.50%. It wants the policy rate in the middle of the corridor. (a) What is the corridor width? (b) What is the mid-point policy rate? (c) Overnight interbank rates are 3.45%. What does this imply?

Show the solution

Width = 4.25% − 3.50% = 0.75% = 75 bp.
Mid-point = (4.25% + 3.50%) ÷ 2 = 7.75% ÷ 2 = 3.875%.
The floor is 3.50%, because banks can deposit at that rate. A market rate of 3.45% is 5 bp below the floor.
A rate below the floor is unusual. It suggests some participants cannot access the deposit facility, for example non-bank lenders, or that the floor is not fully binding.

Answer: Width is 75 bp, the mid-point policy rate is 3.875%, and 3.45% sits 5 bp below the floor, indicating that the floor is not fully binding for all market participants.

Example 2

A banking system has reservable deposits of $800 billion and a reserve ratio of 10%. Banks actually hold $95 billion in reserves. The central bank raises the ratio to 12%. What are the required reserves before and after, and is there a shortfall after the change?

Show the solution

Required reserves before = 10% × $800 billion = $80 billion.
Excess reserves before = $95 billion − $80 billion = $15 billion.
Required reserves after = 12% × $800 billion = $96 billion.
Compare with actual reserves: $95 billion − $96 billion = −$1 billion.
The system is $1 billion short, so banks must raise reserves or cut reservable deposits, which tightens credit and puts upward pressure on short rates.

Answer: Required reserves rise from $80 billion to $96 billion, leaving a $1 billion shortfall against $95 billion held. The change tightens liquidity and pushes short-term rates up.

Exam tips

Always decide first whether an action adds or drains reserves. Most MCQs reduce to that direction.
Read repo wording carefully. Check whether the question uses the central bank's view or the bank's view.
If a question gives facility rates, test every option against the floor and ceiling.
Expect scenario items that link the policy rate to bank funding costs, asset prices and credit risk, so state the full transmission chain.
Do not use the money multiplier as fact unless the question says to assume it.

Practice questions from Monetary and Fiscal Policy: Safeguarding Stability and Trust

Conventional Monetary Policy Tools in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

CFA Level IMonetary Policy Transmission and Tools

Conventional Monetary Policy Tools: frequently asked questions

How do open market operations work?

The central bank buys or sells securities, or runs repo and reverse repo deals, with banks. Buying or lending adds reserves and pushes short rates down. Selling or absorbing cash removes reserves and pushes them up.

What is the difference between the repo rate and the reverse repo rate?

The repo rate is the rate at which the central bank lends cash to banks against collateral. The reverse repo rate is the rate at which it absorbs cash from banks. In India the repo rate is the main policy rate, but other jurisdictions name and use these rates differently, so check the definition given.

How does the policy rate transmit to the economy?

A change in the policy rate moves money market rates first. These feed into bank lending and deposit rates, asset prices, the exchange rate and expectations. Together they change spending and investment, which affects output and inflation with a lag.

Why do reserve requirements matter less today?

Many central banks now steer rates by paying interest on reserves in systems with ample reserves. Reserve requirements are a blunt tool and can disrupt bank funding, so several central banks use them rarely or have set them to zero.