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CFA Level II Exam · Exchange-Traded Funds: Mechanics and Applications

ETF Risks: Counterparty, Liquidity and Market Stress

Updated 7 October 2026 · Fact-checked

ETF risks are the ways an ETF can lose value or fail to track its index beyond normal market moves. The main ones are counterparty risk (swaps, securities lending), underlying liquidity risk, and price dislocations in stress. To answer questions, find who owes the fund, how it is collateralised, and whether arbitrage still works.

Understand ETF Risks: Counterparty, Liquidity and Market Stress

An ETF holds assets and issues shares that trade on an exchange. Its price should stay close to its net asset value (NAV) because authorised participants (APs) can create or redeem shares in exchange for the underlying basket. Risks arise when something weakens that link or when someone owes the fund money.

Counterparty risk is the risk that the other party to a contract fails to pay. It appears in two main places. First, synthetic (swap-based) ETFs do not hold the index securities. They hold collateral and a total return swap with a bank, which pays the index return. If the swap counterparty defaults, the fund may be left with only collateral, which can be worth less than the index exposure or be hard to sell. A physical ETF holds the securities directly (full replication or sampling), so it has no swap exposure.

Second, securities lending. Many physical ETFs lend securities to borrowers for a fee, which can offset costs and reduce tracking difference. The risk is that the borrower defaults and the collateral falls short of the loaned securities' value, or that the collateral is reinvested in assets that lose value. Limits on lending, overcollateralisation, daily marking to market and high-quality collateral reduce the risk. Lending also creates a conflict if the manager keeps a large share of the fee.

Liquidity risk comes from the underlying assets. An ETF can look liquid on the exchange while its holdings (high-yield bonds, emerging-market stocks, small caps) trade thinly. If APs cannot buy or sell the basket cheaply, they widen the spread or stop arbitraging, so the ETF price can move away from NAV. Sampling, basket flexibility and cash creation or redemption can help.

Market stress makes these problems worse. Bid-ask spreads widen, market makers withdraw, and underlying markets may be closed or halted, so NAV may be stale. ETFs can then trade at large discounts to NAV, especially for fixed income, where the ETF price may reveal information that the stale bond prices do not. Exchange circuit breakers and trading halts can also hit ETFs more than the underlying. Other risks include tracking error and, for leveraged or inverse ETFs, daily reset effects, but the exam focus here is counterparty, liquidity and stress.

Key formulas to remember

Premium or discount to NAV
(ETF market price − NAV per share) ÷ NAV per share
Positive is a premium, negative is a discount. Large discounts in stress signal failing arbitrage or stale NAV.
Counterparty exposure (synthetic ETF)
Net exposure = swap mark-to-market value owed by counterparty − collateral held
Only positive net exposure is unsecured. Overcollateralisation reduces it.
Net securities-lending benefit
Fee income to fund = gross lending revenue − lending agent or manager share
Compare with the remaining risk: borrower default and collateral reinvestment losses.

How to solve ETF Risks: Counterparty, Liquidity and Market Stress questions

Use this sequence for any item set question on ETF risk.

  1. 1Identify the ETF structure from the vignette: physical full replication, sampling, or synthetic swap-based.
  2. 2Locate who owes the fund money: a swap counterparty, a securities borrower, or no one.
  3. 3Check protection: collateral type, collateral level, marking to market, lending limits, counterparty diversification.
  4. 4Assess liquidity of the underlying holdings versus the liquidity of the ETF shares themselves.
  5. 5Ask whether authorised participants can still create or redeem at a reasonable cost; if not, expect premium or discount to widen.
  6. 6Check whether NAV is reliable: closed markets or stale prices may distort the discount.
  7. 7Choose the answer that matches the structure and the stated condition, and reject options that confuse physical with synthetic.

Quickest way: Structure, debtor, arbitrage

When to use it: When time is short and the options differ mainly by which risk applies.

  1. Label the ETF: physical or synthetic.
  2. Synthetic means swap counterparty risk; lending means borrower and collateral risk.
  3. Illiquid underlying plus stress means wider spreads and discounts to NAV.
  4. Eliminate options that say physical ETFs have swap risk or that arbitrage always keeps price equal to NAV.

Common mistakes in ETF Risks: Counterparty, Liquidity and Market Stress

  • Saying physical ETFs have no counterparty risk at all.

    Students link counterparty risk only to swaps.

    Fix: Physical ETFs avoid swap risk but still face securities lending borrower risk if they lend.

  • Assuming collateral removes all synthetic ETF risk.

    Collateral sounds like full protection.

    Fix: Collateral may be illiquid, fall in value, or differ from the index; only the unsecured gap is protected incompletely.

  • Equating ETF liquidity with underlying liquidity.

    ETF shares trade all day on an exchange.

    Fix: ETF liquidity depends on the underlying basket and AP capacity; illiquid holdings can mean a fragile ETF.

  • Treating every discount in stress as the ETF being mispriced.

    NAV is assumed to be accurate.

    Fix: NAV may be stale if the underlying market is closed or illiquid; the ETF price may reflect newer information.

  • Thinking securities lending is only a risk and never a benefit.

    Focus on the default scenario.

    Fix: Lending revenue can reduce tracking difference; state both the benefit and the risk.

Worked examples

Example 1

Vignette: A synthetic equity ETF holds a total return swap with one bank and collateral of government bonds. The swap is currently worth ₹50 crore owed to the fund. Collateral held is worth ₹45 crore. Q1: What is the unsecured exposure? Q2: Which action best reduces the risk?

Show the solution
  1. Unsecured exposure = amount owed − collateral = 50 − 45 = ₹5 crore.
  2. The exposure exists only if the counterparty defaults and the collateral can be sold at its stated value.
  3. Reduce the risk by raising collateral above the swap value or spreading swaps across several counterparties.

Answer: Unsecured exposure is ₹5 crore. Overcollateralisation or using multiple counterparties best reduces it.

Example 2

Vignette: A physical bond ETF holds thinly traded high-yield bonds. In a sell-off, its shares trade at 4% below NAV while the bond market is nearly shut. Q1: Why the discount? Q2: Does it prove the ETF is overpriced relative to the bonds?

Show the solution
  1. Underlying bonds are illiquid, so APs face high costs to buy the basket and redeem shares; arbitrage weakens.
  2. The discount reflects the cost and risk APs require to absorb selling pressure.
  3. NAV is based on stale or matrix bond prices, so it may overstate actual sale value.
  4. The ETF price may reflect the true price investors would receive now.

Answer: The discount arises from weakened arbitrage and illiquid underlying bonds. It does not prove the ETF is mispriced, because NAV may be stale.

Exam tips

  • Always state the ETF structure first; most questions turn on physical versus synthetic.
  • Read the vignette for collateral details and lending limits; these decide which option is correct.
  • In stress questions, think about APs, spreads and stale NAV before blaming the ETF.
  • Watch for absolute words such as always or never; ETF risk statements are usually conditional.

ETF Risks: Counterparty, Liquidity and Market Stress: frequently asked questions

What is the difference between a physical and a synthetic ETF?

A physical ETF holds the index securities or a sample of them. A synthetic ETF holds collateral and a swap with a bank that delivers the index return. Synthetic ETFs carry swap counterparty risk.

What is ETF securities lending risk?

It is the risk that a borrower defaults and the collateral is worth less than the securities lent, or that reinvested cash collateral loses value. Limits, high-quality collateral and daily marking to market reduce it.

Why do ETFs trade at discounts in market stress?

Spreads widen, market makers step back and APs find arbitrage costly or impossible, especially with illiquid holdings. NAV may also be stale, so part of the discount can be a pricing-information effect.

Is counterparty risk the same as liquidity risk?

No. Counterparty risk is a party failing to pay. Liquidity risk is difficulty trading at a fair price. They can occur together in stress.