CFA Level II Exam · Hedge Fund Strategies

Event-Driven Hedge Fund Strategies for CFA Level II

Updated 7 October 2026 · Fact-checked

Event-driven strategies profit from price moves around corporate events such as mergers, bankruptcies, spin-offs and activist campaigns. Merger arbitrage buys the target and may short the acquirer. Distressed funds buy troubled securities. Activists push for change. To solve questions, identify the event, the source of return and the main risk.

Understand Event-Driven Strategies

Event-driven strategies are hedge fund strategies that take positions in companies facing a specific corporate event. The event might be a merger, a bankruptcy, a spin-off, a restructuring or a shareholder campaign. The manager forecasts how the event will resolve and how long it will take. Returns come from the outcome, not from the general direction of the market.

Merger arbitrage is the best-known strategy. After a deal is announced, the target's share price usually trades below the offer price. That gap is the deal spread. The manager buys the target and holds it until the deal closes, collecting the spread. In a stock-for-stock deal, the manager also shorts the acquirer in proportion to the exchange ratio. The short offsets acquirer price moves, so the profit comes from the spread, which is earned only if the deal closes. The spread is the compensation for deal risk: if the deal fails, the target price usually falls sharply. The payoff is often compared to selling insurance: small gains most of the time and a large loss when a deal breaks.

Distressed securities strategies buy the debt or equity of companies in or near bankruptcy, often at deep discounts. The manager believes the securities are worth more than the market price, either because the company recovers or because the claim receives more in a restructuring than expected. Hedge funds often buy debt in the part of the capital structure expected to receive the new equity, called the fulcrum security. Risks include long and uncertain legal processes, illiquidity, valuation difficulty and the chance that recovery is lower than expected. Managers may short other securities in the same capital structure as a hedge.

Activist strategies take a significant stake in an undervalued or poorly run company and push for change. Demands may include board seats, asset sales, spin-offs, buybacks, cost cuts or a sale of the company. The activist profits if the changes unlock value. Activists usually run concentrated, long-biased positions, with little shorting. Risks include the cost and time of the campaign, resistance from management, poor liquidity in a large stake and a falling share price if the campaign fails.

Special situations is a wider group. It covers spin-offs, share buybacks, restructurings, recapitalisations, tender offers and other one-off events. Some managers also trade other corporate events. The common thread is that the manager analyses the specific event and its likely effect on value, rather than the overall market.

Across all these strategies, event-driven returns tend to show some equity-market and credit exposure, and correlation with markets tends to rise in stress. Leverage and liquidity can magnify losses when many deals fail together or credit markets freeze.

Key formulas to remember

Deal spread (dollar): Spread = Offer price − Target market price; For a cash deal. For a stock deal, use the offer value implied by the acquirer's price times the exchange ratio.
Spread return (not annualised): Spread return = (Offer price − Target price) ÷ Target price; This is the return if the deal closes at the offer price, ignoring costs and dividends.
Annualised spread return (simple): Annualised ≈ Spread return × (12 ÷ months to close); A quick approximation. Compounding gives (1 + spread return)^(12 ÷ months) − 1.
Stock-deal offer value: Offer value per target share = Exchange ratio × Acquirer share price; The arbitrageur buys one target share and shorts exchange-ratio shares of the acquirer.
Expected value with deal probability: E(P) = p × Price if deal closes + (1 − p) × Price if deal fails; Used to find the market-implied probability: p = (Current price − Fail price) ÷ (Close price − Fail price).

How to solve Event-Driven Strategies questions

Use this method for any event-driven item. Read the vignette for the event, the securities and the numbers before you look at the questions.

1Identify the strategy: merger arbitrage, distressed, activist or special situations. The event in the vignette tells you.
2Write down the positions: what is bought, what is shorted, and where each sits in the deal or capital structure.
3Find the source of return: deal spread, recovery above market price, or value unlocked by change.
4Do any calculation needed: spread, annualised return, exchange-ratio hedge, or implied deal probability. Keep units and timing consistent.
5Identify the main risk: deal break, legal delay, illiquidity, valuation error or campaign failure.
6Check hedges and exposures: a stock deal hedged with a short acquirer position still carries deal risk.
7Match your answer to the exact wording of the question and eliminate the options that describe a different strategy.

Quickest way: Event, return source, risk

When to use it: Use this when you have about two minutes for a conceptual question on event-driven strategies.

Name the event in the vignette.
Say who gets paid: merger arbitrage gets the spread, distressed gets recovery, activist gets value from change.
Name the risk that matches: deal break, process delay, illiquidity or failed campaign.
For numbers, compute the spread as (offer − price) ÷ price, then scale by 12 ÷ months.
Pick the option that fits all three points.

Common mistakes in Event-Driven Strategies

Saying merger arbitrage is market-neutral with no real risk.
The short position hedges market moves, so it looks safe.
Fix: Remember the hedge does not cover deal failure. If the deal breaks, the target falls and the loss is large relative to the small spread.
Shorting the target and buying the acquirer in a stock deal.
Students mix up which side the spread favours.
Fix: The usual trade is long the target, short the acquirer. The target trades below the implied offer value, so you buy it.
Confusing distressed and activist strategies.
Both involve troubled or undervalued companies.
Fix: Distressed funds buy securities of firms in or near bankruptcy and profit from recovery or restructuring. Activists take stakes in going concerns and push management for change.
Ignoring time when comparing spreads.
A larger raw spread looks better.
Fix: Annualise before comparing. A 3% spread over three months beats a 5% spread over twelve months on a simple basis.
Forgetting the short leg's exchange ratio.
Students short one acquirer share per target share automatically.
Fix: Short the number of acquirer shares equal to the exchange ratio for each target share bought.
Treating event-driven returns as unrelated to markets in all conditions.
The strategies are described as event-based.
Fix: In stress, deals fail, credit spreads widen and liquidity falls, so correlations and losses can rise together.

Worked examples

Example 1

Vignette: Acquirer Norlan Ltd announces an all-cash offer of $50.00 per share for Target Pelio Inc. Pelio trades at $48.00. The deal is expected to close in 6 months. A fund buys Pelio. Q1: What is the spread return and its simple annualised value? Q2: If the deal fails and Pelio falls to $38.00, what is the loss per share? Q3: What deal probability does the market imply?

Show the solution

Q1: Spread = 50.00 − 48.00 = $2.00.
Spread return = 2.00 ÷ 48.00 = 4.1667%.
Simple annualised = 4.1667% × (12 ÷ 6) = 8.33%.
Q2: Loss = 48.00 − 38.00 = $10.00 per share, or 10 ÷ 48 = 20.83%.
Q3: p = (48 − 38) ÷ (50 − 38) = 10 ÷ 12 = 0.8333.

Answer: Spread return is 4.17% (about 8.33% annualised, simple). Failure loss is $10.00 per share (20.83%). The market-implied probability of completion is about 83.3%.

Example 2

Vignette: Hollis Corp offers 0.80 of its own shares for each share of Target Brenn. Hollis trades at $60.00 and Brenn trades at $46.00. A merger arbitrage fund buys 10,000 Brenn shares. Q1: What is the implied offer value per Brenn share? Q2: How many Hollis shares does the fund short? Q3: What is the spread per Brenn share and the total spread if the deal closes with prices unchanged at the start values?

Show the solution

Q1: Offer value = 0.80 × 60.00 = $48.00.
Q2: Shares shorted = 10,000 × 0.80 = 8,000 Hollis shares.
Q3: Spread per share = 48.00 − 46.00 = $2.00.
Total spread = 2.00 × 10,000 = $20,000.
Check the hedge: short 8,000 × $60 = $480,000 of Hollis stock offsets the value of the 10,000 Brenn shares at offer terms (10,000 × $48 = $480,000).

Answer: The implied offer value is $48.00 per share. The fund shorts 8,000 Hollis shares. The spread is $2.00 per share, or $20,000 in total, earned only if the deal closes.

Exam tips

Always start by naming the strategy from the event in the vignette. Wrong-strategy options are common distractors.
For merger arbitrage, expect questions on the long-target, short-acquirer trade and on what happens if the deal breaks.
When asked about risk, link it to the strategy: deal break for arbitrage, legal delay and illiquidity for distressed, campaign failure for activist.
Annualise spreads before comparing deals, and read whether the question wants a simple or compounded figure.
Remember that event-driven funds can show higher correlation with markets in stress, so avoid answers claiming they are always uncorrelated.

Event-Driven Strategies in other exams

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

Event-Driven Strategies: frequently asked questions

How does merger arbitrage work?

After a deal is announced, the target trades below the offer value. The fund buys the target and, in a stock deal, shorts the acquirer by the exchange ratio. If the deal closes, the fund earns the spread. If it fails, the target usually falls and the fund takes a loss.

What is the difference between distressed securities and activist strategies?

Distressed funds buy debt or equity of firms in or near bankruptcy and profit from recovery or restructuring. Activist funds take stakes in going concerns and press management for changes such as board seats, asset sales or buybacks. The source of return is different in each case.

What are the main risks of merger arbitrage?

The main risk is deal failure, from regulatory block, financing problems, shareholder rejection or a changed bid. Losses on a failed deal can be much larger than the gain from the spread. Delays also reduce the annualised return.

What is a special situations strategy?

It covers one-off corporate events such as spin-offs, buybacks, recapitalisations and restructurings. The manager analyses how the event changes the value of the firm's securities. It is a broader group than merger arbitrage, distressed or activist.