Key question
Does it make sense to prehedge a future bond issuance with a forward-starting swap, and if so — what is the optimal horizon and tenor?
Monitor the cost of locking in rates early
Hedging now typically locks in the forward rate — generally higher than today's spot, but certain. Waiting preserves flexibility at the cost of rate uncertainty: in a stress scenario, the rate could rise well above the forward level.
Identify the right moment for today's rate environment
Prehedging typically delivers savings during rising rate cycles, which have historically lasted around 10 months. Entering a forward swap near the start of a hiking episode — within a one-year horizon — has been the most cost-effective approach.
Forward-Looking Hedge Cost Estimate
Current 5Y swap rate: 0.35%. Forward rate in 12M: 0.64%. Hedging today carries a forward premium over the spot rate. Leaving the issuance unhedged preserves flexibility, but under a stress scenario (95th percentile) the swap rate in 12M could rise by +0.44% above the forward level.
If hedged today
+0.29%
overpayment vs. spot rate
If not hedged today
+0.44%
potential overpayment vs. spot rate with 5% probability
Issuance Date Flexibility
If the exact issuance date is uncertain, a forward-starting swap on a different tenor remains an effective proxy hedge. Swap rates across maturities of 5–20 years are highly correlated historically, which limits the basis risk even when the bond tenor differs from the hedge tenor.
Min. correlation (5Y vs. 20Y)
81%
most distant tenor pair · 1999–2018
Min. correlation (7Y vs. 20Y)
89%
next most distant pair
Historical Hedge Cost Analysis
Hedge premium — the difference between the forward rate at hedge inception and the realised swap rate. Positive premium: overpayment (rates did not rise). Negative: saving (rates rose above the forward).
Average prehedging cost
+0.62%
avg. forward rate minus realised rate · 2009–2018
Proportion with positive cost
82%
quarters when locking in early cost more than waiting
Hedge Cost During Rising Rate Environments
Historical EUR 5Y rate rising periods (local trough → peak). During these periods hedging is historically beneficial: the forward rate is below the realised rate. Over a 1-year rising rate cycle, hedging is on average advantageous (depends on the selected analysis period).
Avg. prehedging cost · hiking periods
−13 bp
5Y swap · 3M–1Y horizons · 2009–2018 · hiking periods only
Optimal Hedge Horizon
up to 1Y
historically most cost-effective horizon
Demo is based on historical data. In the full version — current data, your currency, your company's portfolio.