Credit Long/Short Strategy: Spread Trades Explained

Key Takeaways

• Shorts in credit long/short are typically expressed through bought CDS protection, since physically shorting cash bonds requires hard-to-find borrow.
• Legs are sized using risky PV01 (spread DV01) to neutralize the portfolio against parallel spread moves, not rate DV01.
• Capital structure arbitrage pairs debt against equity in the same issuer using a Merton-model delta to size the equity short.
• During crisis periods most credits widen together, so even well-constructed long/short books can suffer large correlated drawdowns.

What It Is

A long/short credit portfolio holds long positions in bonds or loans the manager views as cheap and short positions in bonds or CDS on names viewed as rich. Shorts are typically expressed as bought CDS protection, since physically shorting cash bonds is often difficult due to borrow constraints.

The strategy spans the capital structure. Some managers pair long senior debt against short subordinated debt. Others trade debt against equity in the same issuer, a variant called capital structure arbitrage. Still others pair names within the same sector, buying the stronger credit and shorting the weaker one.

The Intuition

Credit is a cross-section game. At any point, hundreds of issuers have spreads determined by market technicals, ratings inertia, and imperfect information. Skilled credit analysts can identify companies where spreads do not reflect the underlying fundamentals, then express that view in both directions.

A long-only credit fund earns about 4 to 7 percent in spread carry over Treasuries in normal times but loses 10 to 20 percent in a crisis. A long/short fund targets similar returns with a fraction of the drawdown because the short book hedges the market-wide widening.

John Paulson's 2007 trade is the textbook example of aggressive credit long/short. His analyst Paolo Pellegrini identified that subprime mortgage bonds were priced for a benign housing outcome. Paulson bought CDS protection on those bonds while holding long positions elsewhere, and the fund earned roughly 4 billion dollars when the trade worked.

How It Works

A long leg might be a 5-year corporate bond yielding 6 percent against 4 percent Treasuries, so 200 bps of spread carry. A matched short leg buys CDS protection on a weaker name at 250 bps, paying premium. If the short premium is less than the long carry, the paired trade earns positive carry before any spread moves.

Directional P&L comes from spread convergence. If the long tightens from 200 to 150 bps while the short widens from 250 to 350 bps, both legs gain. Leg sizing uses spread DV01, also called risky PV01, to neutralize the portfolio against a parallel spread move.

Notional_long x RiskyPV01_long = Notional_short x RiskyPV01_short

Capital-structure arbitrage uses a different hedge ratio, derived from a Merton-style structural model. For example, if management issues heavy equity while the bond trades at a distressed price, a trader might go long the bond and short a delta-weighted amount of stock. The bond rally in a successful recap gains more than the equity hedge loses.

Worked Example

Assume a fund targets a pair trade within the retail sector. Company A is a well-capitalized chain with a BBB-rated 5-year bond trading at 180 bps over Treasuries. Company B is a struggling competitor with a B-rated 5-year bond trading at 550 bps and 5-year CDS at 525 bps.

The fund buys 50 million of the A bond at 180 bps and buys 50 million of CDS protection on B at 525 bps, sized for equal risky PV01 of roughly 4. The carry is 180 - 525 = minus 345 bps on 50 million, or about 1.73 million per year paid out.

Six months later, Company B misses quarterly earnings and its CDS widens to 800 bps. Company A's spread holds at 180 bps. The short leg gains 275 bps x 4 = 11 points on 50 million, roughly 5.5 million. The long leg is flat. Net profit, after six months of carry, is about 4.6 million on 50 million of gross exposure.

Common Mistakes

• Ignoring the carry bill. When the short leg premium exceeds the long leg coupon, the trade bleeds every day. A pair that looks attractive on spread differential can lose money even if spreads move in the expected direction, if the move takes too long.
• Matching DV01 instead of spread DV01. Rate DV01 hedges against Treasury moves, not credit moves. A credit long/short must size on risky PV01 or spread duration.
• Underestimating basis risk. Shorting CDS on one name to hedge a bond in the same issuer seems clean, but restructuring clause differences and deliverability in auctions can produce unexpected P&L after a credit event.
• Ignoring correlation in crisis. During 2008 and 2020, almost every credit widened together. A diversified long/short book that looked well-hedged by factor exposure still suffered large drawdowns because idiosyncratic shorts did not widen faster than broad longs.
• Concentrating capital structure arb bets. Structural models assume management behaves rationally. Distressed recaps, fraud, or strategic bankruptcies violate those assumptions, and a 10 percent capital-structure bet can wipe out months of gains.

Frequently Asked Questions

Why is CDS more commonly used for short positions than physically shorting bonds? Shorting a cash bond requires borrowing it from a current holder and paying a lending fee. The borrow market for corporate bonds is thin, with many issues unavailable or prohibitively expensive to borrow. CDS allows a trader to take the economic equivalent of a short position by buying protection without the need to source and borrow the bond. CDS is also highly standardized, with tight bid-ask spreads on liquid names, making it cheaper to implement and unwind.

How does capital structure arbitrage differ from a standard credit pair trade? A standard credit pair trade compares bonds from two different issuers in the same sector. Capital structure arbitrage operates within one issuer, taking opposing positions in different layers of the same capital structure, such as long the bond and short the equity. The trade profits when the market's implied valuation of the company across its debt and equity layers is inconsistent, typically estimated using a Merton-style structural model to derive the fair equity delta.

What is the typical return target and Sharpe ratio for credit long/short funds? Return targets vary by strategy and leverage, but many credit long/short funds target annual net returns in the high single digits to low double digits. Sharpe ratios for skilled managers typically range from 0.5 to 1.5 over a full cycle, materially better than long-only credit which has a Sharpe around 0.3 to 0.5. The improvement comes from the hedge book dampening drawdowns during credit crises.

How does a credit long/short manager handle a credit event on a shorted name? When a shorted reference entity triggers a CDS credit event, the protection buyer (who is short) receives par minus recovery rate on the notional. The manager must deliver deliverable obligations into the auction or cash-settle at the auction price. This is typically a large gain on the short leg, partially offset by any losses on any long positions in correlated names. Managing the timing and settlement process requires active coordination with the prime broker and CDS desk.

How do credit long/short strategies perform in different credit cycle phases? In early cycle recoveries, long positions in distressed or beaten-down names tend to outperform as spreads compress. In mid-cycle, the strategy earns carry on the long book while the short book has modest costs. In late cycle and recessions, the short book earns as spreads widen, ideally protecting more than the long book loses if pair selection was correct. True market-neutral performance requires the short book to widen faster than the long book in stress, which is achievable with sector or issuer-specific shorts but harder with index shorts.

Sources

1. The Hedge Fund Journal. Long/Short Credit Strategy. https://thehedgefundjournal.com/long-short-credit-strategy/
2. S&P Dow Jones Indices. CDX: Tradable CDS Indices. https://www.spglobal.com/spdji/en/landing/topic/cdx-tradable-cds-indices/
3. Institutional Investor. Paulson at Center of Goldman Complaint. https://www.institutionalinvestor.com/article/2btgd2idtfahw7g6wy3uo/portfolio/paulson-at-center-of-goldman-complaint
4. ISDA. 2009 Big Bang Protocol. https://www.isda.org/traditional-protocol/big-bang-protocol/

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.