Telecom · November 2025 · 8 min read
Spectrum reserve prices and the FX exposure regulators do not price
Spectrum reserve prices in most African markets are set in local currency and paid in tranches over years. The dollar-equivalent receipt the ministry of finance underwrites is a function of an FX path no one in the auction design office is modelling.
The argument
A reserve price expressed in local currency, with payments phased over many years, is a de-facto FX derivative that the treasury is writing to the winning bidder. Modelling the local-currency-to-dollar path over the payment window — using the actual historical distribution rather than a flat assumption — typically moves the dollar-equivalent receipt materially. In several recent auctions, that gap has been larger than the difference between competing bids.
What we see in the field
On an illustrative auction review, running the reserve price against the local-currency depreciation distribution over the payment window moves the expected dollar receipt substantially. That number rarely appears in the auction memorandum, and the treasury tends to absorb the gap after the fact.
What it changes
For regulators, indexing spectrum payments to a stated FX or CPI floor is the difference between a receipt that holds and one that erodes. For operators, an un-indexed local-currency reserve is a policy asymmetry worth pricing into the bid.
Where to start
Before the next auction is announced, run the reserve price as a distribution over the payment window and publish the base and downside dollar-equivalent receipt. If the two diverge materially, index the payment structure.
