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What Is a Zero-Coupon Inflation Swap (ZCIS)?
Let me explain what a zero-coupon inflation swap, or ZCIS, really is. It's a derivative where you exchange a fixed-rate payment on a notional amount for a payment based on the inflation rate. This setup lets you either cut down or ramp up your exposure to shifts in money's purchasing power.
You might hear it called a breakeven inflation swap sometimes.
Key Takeaways
Here's what you need to know: A ZCIS is an inflation derivative swapping an income stream linked to inflation for one with a fixed interest rate. Unlike periodic payments, it pays both streams as a single lump sum at maturity once inflation is known.
If inflation goes up, the inflation buyer gets more from the seller than they paid. If it drops, they get less.
Understanding a Zero-Coupon Inflation Swap (ZCIS)
An inflation swap transfers inflation risk via fixed cash flow exchanges. A ZCIS is a straightforward version, trading an inflation-tied stream for a fixed-rate one. Think of it like a zero-coupon security—no periodic interests, just a lump sum at maturity.
In a ZCIS, both payments happen as one at the end when inflation is clear. The payoff hinges on the inflation rate over time, measured by an index. It's essentially a bilateral contract to hedge inflation.
Important note: While payments usually swap at term's end, you could sell the swap OTC before maturity if you're the buyer.
As the inflation receiver or buyer, you pay a fixed rate and get an inflation-linked payment from the seller. The fixed side is the fixed leg, the other is the inflation leg. That fixed rate is the breakeven swap rate, though payouts might not even out.
Payments reflect the gap between expected and actual inflation. If actual exceeds expected, it's a capital gain for the buyer. Higher inflation means more earnings for the buyer; lower means less.
Computing the Price of a Zero-Coupon Inflation Swap (ZCIS)
The inflation buyer pays the fixed leg, calculated as: Fixed Leg = A × [(1 + r)^t - 1], where A is the notional, r the fixed rate, t the years.
The seller pays the inflation leg: Inflation Leg = A × [(I_E ÷ I_S) - 1], with I_E as end inflation index, I_S as start.
Example of a Zero-Coupon Inflation Swap (ZCIS)
Suppose two parties agree to a five-year ZCIS with $100 million notional, 2.4% fixed rate, and CPI at 2.0% start, ending at 2.5%.
Fixed Leg = $100,000,000 × [(1.024)^5 - 1] = $12,589,990.68. Inflation Leg = $100,000,000 × [(0.025 ÷ 0.020) - 1] = $25,000,000.00.
The fixed leg party gets $12.59M but pays $25M, netting a loss. Since inflation compounded above 2.4%, the buyer profits; seller would if below 2.25% for breakeven.
Special Considerations
The swap's currency sets the index—USD uses CPI, GBP uses RPI.
Like any debt, there's default risk; parties might collateralize to mitigate.
Other hedges include real yield swaps, TIPS, inflation-linked securities, CDs, and bonds.
Benefits of Inflation Swaps
An inflation swap gives you a solid estimate of the market's breakeven inflation rate, like pricing a commodity through buyer-seller agreement.
Parties agree based on their inflation views for the period, exchanging flows on a notional to focus on inflation risk, not interest rates.
Related Concepts
A zero-cost inflation swap is basically this hedge sold to another with payment at maturity based on then-inflation.
A zero-coupon swap involves fixed payments swapped for floating based on an interest index.
An inflation swap works with one party paying fixed, the other floating on an inflation index.
The Bottom Line
In essence, a zero-coupon inflation swap is selling an inflation-adjusting debt instrument to another for a fixed amount at maturity, used to hedge inflation.
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