What is a credit spread option, and how does it differ from a credit default swap for hedging credit risk?

Credit spread options are a nuanced credit derivative that provides protection against spread widening — a much broader and more common event than outright default. This makes them particularly useful for mark-to-market hedging.

What a Credit Spread Option Is:

A credit spread option gives the holder the right (not obligation) to buy or sell protection at a predetermined spread level.

Credit Spread Put (Most Common for Hedging):

• Pays off when the credit spread WIDENS beyond the strike spread
• Payoff = max(0, Spread at Expiry - Strike Spread) x Duration x Notional
• Analogous to a put option on the bond price (wider spreads = lower prices)

Credit Spread Call:

• Pays off when the credit spread NARROWS below the strike spread
• Used for speculating on credit improvement

CDS vs. Credit Spread Option:

Worked Example:

Granite Capital holds $50M of Silverline Corp senior unsecured bonds trading at a spread of 180 bps to Treasuries (duration = 6 years).

They buy a credit spread put with:

• Strike spread: 250 bps
• Expiry: 6 months
• Premium: 45 bps upfront (0.45% x $50M = $225,000)
• Notional: $50M

Scenario A: Spread widens to 400 bps

• Payoff = (400 - 250) x 6 x $50M / 10,000 = 150 x 6 x $50M / 10,000 = $4.5M
• Bond portfolio loss ≈ (400 - 180) x 6 x $50M / 10,000 = $6.6M
• Net loss after hedge: $6.6M - $4.5M + $0.225M = $2.325M (65% reduction)

Scenario B: Spread narrows to 120 bps

• Payoff = $0 (spread below strike, option expires worthless)
• Bond portfolio gain ≈ (180 - 120) x 6 x $50M / 10,000 = $1.8M
• Net gain: $1.8M - $0.225M = $1.575M (still participate in most of the tightening)

When to Prefer Credit Spread Options Over CDS:

1. Mark-to-market mandated: Trading books require daily P&L hedging, not just default protection
2. Spread volatility without default: Investment-grade credits rarely default but experience significant spread moves
3. Cost efficiency: One upfront payment vs. ongoing CDS premiums
4. Partial hedge desired: Options provide asymmetric protection (participate in tightening, hedged on widening)
5. Event-specific hedging: Protect against a specific risk event (earnings, regulatory decision) over a short period

Exam Tip: Know the payoff formula (spread difference x duration x notional), understand the key advantage over CDS (pays on spread moves, not just default), and be able to calculate the effectiveness of the hedge in a scenario.

Master credit derivatives in our CFA Level II fixed income and derivatives modules.