Emerging-market currencies hold, drift and then adjust in steps. The long flat periods between steps are what Tranchco monetises.
Look at a ten-year chart of almost any emerging-market currency and the shape is the same. The Pakistani rupee went from 104 to the dollar in December 2016 to around 279 today, but not along a line: long plateaus, then a step, then another plateau. The Egyptian pound moved from roughly 9 to over 50 in three steps, in 2016, 2022 to 2023 and 2024. The naira went from under 500 to over 1,600 in the 2023 to 2024 unification and then settled near 1,350. The staircase is the pattern, and the forward market prices a slope.
Tranchco calls the plateaus the calm regime. They are long: across twenty-five years of State Bank of Pakistan daily data, 97.7 percent of all rupee depreciation occurred inside 30-day windows, and 90 percent of volatility episodes returned to calm within nine days. The steps are short, and they cluster. Between them the currency does very little, and a holder of a three-month bill who is not caught by a step collects the yield.
Two consequences follow. The first is about price. Continuous forward protection charges every day for a risk that arrives a few days a year; the overpayment is large and persistent. The second is about who can price the risk. A domestic institution that lives inside the currency, reads the central bank and the external balance daily, and holds the sovereign’s bills already, has information about the next step that no offshore forward desk has. There has been no regulated venue in which that institution could sell its conviction to a dollar investor in a bounded form.
The PARK mechanism provides that venue as a capital structure. A dollar investor holds a senior claim earning the local sovereign-bill yield; a domestic institution holds a junior layer in its own currency and elects to take a bounded first loss for a premium, in a loss order agreed before entry. A rules-based engine computes both NAVs daily from published prices and parks exposure at pre-committed thresholds, so that the trade is live in the calm regime and off, by rule rather than discretion, when the regime deteriorates. Tranchco monetises the calm regime and declines to trade the crisis. The engine does not forecast the currency; it governs when the structure is permitted to carry its risk.
The regime statistics and their definitions are described on the data page; the mechanism and its historical testing are in The Calm Regime, July 2026, available on request.