Positive Carry
Positive carry refers to the net income earned by holding a financial position, whereby the yield or cash flow generated by the asset exceeds the cost of financing that position. In fixed income markets, positive carry occurs when the coupon income from a bond or other instrument exceeds the short-term borrowing rate used to fund the position—creating a positive daily income stream simply for holding the position.
Key takeaways
- Positive carry generates income from holding a position; negative carry creates a daily cost that must be overcome by capital appreciation to be profitable.
- In a normal (upward-sloping) yield curve environment, borrowing short and holding long-dated bonds generates positive carry through the rate differential.
- Carry trades are vulnerable to sudden rate changes, credit events, and curve shifts that can quickly eliminate accumulated carry and generate capital losses.
- The carry component of total return is particularly important in high-yield and emerging market bonds, where coupon income dominates total returns over long periods.
- Repo financing rates (the cost of borrowing to fund bond positions) are the primary determinant of whether a fixed income position has positive or negative carry.
Explanation
Carry is one of the most enduring and economically intuitive concepts in fixed income investing. The carry on a leveraged fixed income position is simply the difference between what the asset earns (coupon, dividend, premium received) and what it costs to finance (repo rate, borrowing cost). When the asset yield exceeds the financing rate—which is typically the case when the yield curve is positively sloped—the position has positive carry and generates daily income regardless of whether the asset price changes.
The carry trade as an investment strategy involves explicitly exploiting yield differentials across the maturity spectrum or across credit quality tiers. A classic carry trade borrows at the overnight repo rate (say 5.0%) to fund a 10-year Treasury position yielding 5.5%. The 50 basis point carry differential generates approximately $500,000 annually on a $100 million position. This income compensates for the duration risk (price sensitivity to interest rate changes) and the rollover risk (the possibility that short-term financing rates rise, eliminating or reversing the positive carry).
In currency markets, carry trades involve borrowing in low-interest-rate currencies (historically the Japanese yen or Swiss franc) and investing in high-interest-rate currencies (historically the Australian dollar or Turkish lira). The currency carry trade has historically generated positive returns with Sharpe ratios comparable to equity investing, but is subject to sudden reversals—carry trade 'unwinds'—during risk-off episodes when investors simultaneously exit leveraged carry positions, causing the funding currency to appreciate sharply and the investment currency to depreciate.
The relationship between carry and credit spread is particularly nuanced in corporate and structured credit. A BBB-rated corporate bond yields 150 basis points over Treasuries. An investor funding the purchase at the repo rate earns the Treasury yield (covering financing cost), plus the 150 bp spread—which represents both compensation for default risk and the carry income. In benign credit environments, the spread income significantly exceeds the realized default losses, generating substantial positive carry. During credit crises, spreads widen (causing capital losses) even as carry income continues, potentially leaving the investor in a position where cumulative carry income cannot offset mark-to-market losses.
For hedge funds, carry analysis is integral to the return attribution process. Decomposing actual returns into carry, roll-down, price change, and currency components allows the fund to identify which sources of return are predictable and sustainable (carry, roll-down) versus which reflect active bets (duration, curve, credit spread changes). This decomposition guides position sizing and risk management, ensuring the portfolio does not inadvertently accumulate excessive concentration in any single return driver.
Formula
Carry = Asset Yield - Financing Rate (repo rate or short-term borrowing cost)
Example
A fixed income hedge fund borrows $50 million via overnight repo at 5.10% to fund a position in 5-year investment-grade corporate bonds yielding 6.00%. Daily carry income = $50M × (6.00% - 5.10%) ÷ 360 = $1,250 per day, or approximately $456,000 annually on this position. Additionally, as time passes, the bonds roll down the yield curve: originally 5-year bonds, they become 4-year bonds after one year. If the yield curve is upward-sloping and 4-year IG corporates yield 5.80%, the bonds are now priced to yield 5.80%—generating a capital gain from the roll of approximately 4 × (6.00% - 5.80%) × $50M × 0.01 = $40,000. Total carry plus roll return for the year ≈ $496,000, representing a 0.99% net return on the $50M position before considering any credit spread changes.
Related terms
Asset Backed Security Bankers Acceptance Basis Bond Carry Trade Corporate Bond Credit Spread Default Dirty Price Dividend Duration Equity