For 80 years, the dollar has set the price of every trade, every import, every debt. Not because it is right. Because no one built a better measure — until now.
80-Year Failure Arc
The problem was identified in 1944. Seven serious attempts followed. Every one failed — not because the idea was wrong, but because the mechanism didn't exist. Until now.
Why Now
Over the past decade the international economic environment has shifted from a relatively stable, integrated system toward a more fragmented and multi-polar landscape. Trade patterns, capital flows, and supply chains are adjusting in ways that are not always reflected in market exchange rates.
As a result, traditional FX pricing — while highly liquid and efficient in execution — can diverge from underlying economic conditions. This divergence is not constant, but it becomes more pronounced during periods of transition. RTU was built for this environment.
"In periods of structural change, market pricing and underlying economic conditions can diverge more frequently. RTU is designed to provide clarity in this environment."
Purahu RTU — Sovereign Intelligence Engine
"She did not ask for permission to build what the world needed."
Hatshepsut ruled Egypt not by inheritance but by vision. She sent trade expeditions to Punt when the world said it couldn't be done. She built temples while advisors counseled caution. She understood that commerce, when properly priced, creates civilizations — not empires built on extraction.
The RTU carries that legacy forward. Not a weapon. A measuring rod. The kind Hatshepsut's merchants carried to Punt — so both sides of the trade knew exactly what they were exchanging.
The Four Failure Modes — Solved
Join the Movement
Finance ministers, traders, development economists, and sovereign wealth funds are all asking the same question: what is a fair price? Sign up for early access to RTU Intelligence Reports.
The Hidden Mechanism
"Every time you import goods, your government pays an invisible tax — not to your treasury, but to the architecture of dollar supremacy. It has no line item. It shows up in your inflation, your debt service, your trade deficit, and your children's wages."
— The FX Import Tax: How It Works
Step by Step
The exchange rate between your currency and the dollar is set primarily by foreign exchange traders in London, New York, and Singapore — not by the IMF, not by your central bank, and not by the goods you produce. These traders price currencies based on capital flows, interest rate differentials, and sentiment. Your inflation rate, your trade balance, your infrastructure — irrelevant to the daily fix.
The dollar benefits from what economists call "exorbitant privilege." Because reserves are held in dollars globally, demand for dollars is permanently elevated above what the US economy alone would justify. The US runs a 122% debt-to-GDP ratio, a persistent current account deficit, and a service-dependent economy where 40% of cognitive jobs face AI displacement — yet the dollar trades as though none of this exists.
When Ethiopia buys petroleum, India buys semiconductors, or Nigeria buys machinery — the invoice arrives in dollars. At a dollar price structurally above its fundamental value. The buyer pays not the real exchange rate, but the real rate plus the privilege premium. This premium is not zero. For severe cases like Turkey and Nigeria, it exceeds 100%.
The import overcharge passes through the economy as higher consumer prices, higher production costs, and higher external debt service. Central banks raise rates to fight the inflation — which was caused by the dollar premium, not domestic excess. Rate hikes slow the economy. Real wages fall. The financial sector, which holds dollar assets, gains. The bottom 60% loses ground. The gap between financial wealth and wage income is not a failure of capitalism in the abstract — it has a mechanism. This is it.
RTU scores two economies on 19 fundamental factors. The bilateral ratio gives the fair trade price. The gap between this price and the FX rate is the import premium — quantified, published, and impossible to deny. Two countries can now negotiate, net, or route around it. Not by fighting the dollar. By measuring what their exchange should actually be.
Import Price Reality
| Country | RTU Score | FX Rate / USD | Fair RTU Rate | Import Premium | Annual Overcharge Est. |
|---|---|---|---|---|---|
| 🇳🇬 Nigeria | 91 | ~1,418 | ~650/USD | +116% | ~$28B/year |
| 🇹🇷 Turkey | 253 | ~45 | ~18/USD | +127% | ~$55B/year |
| 🇪🇹 Ethiopia | 43 | ~155 | ~79/USD | +97% | ~$8B/year |
| 🇮🇳 India | 59 | ~95 | ~73/USD | +24% | ~$132B/year |
| 🇨🇳 China | 44 | ~6.8 | ~5.4/USD | +21% | ~$590B/year |
| 🇺🇸 USA | 26 | 1.00 | — | +15% overvalued | Exorbitant privilege |
| 🇩🇪 Germany | 43 | ~0.86 | ~0.84/USD | Near parity | ~Fairly priced |
| 🇰🇪 Kenya | 34 | ~129 | ~132/USD | −2.5% | Closest to RTU fair value |
| 🇯🇵 Japan | 11 | ~158 | ~100/USD | +57% | Carry trade destruction |
The Long Arc
The decolonization wave of the 1950s–1970s transferred flags, constitutions, and parliaments — but left the price mechanism intact. Trade was still invoiced in sterling, then dollars. Debt was still borrowed in dollars. IMF conditions were still written to protect creditor interests. A nation can elect whoever it wishes. But if it cannot price its own exports, control its own import costs, or settle trade without first acquiring dollars — it remains economically colonized regardless of its constitution.
The Containment Fallacy
Military blockades, tariff walls, and technology bans operate on the assumption that economic power can be contained by force. But economic power is rooted in fundamentals — resources, productivity, demographic depth, energy independence, reserve adequacy. China's RTU score reflects an economy with 6.83 FX rate while its fundamental value suggests 5.4. Japan, starved of energy independence and crushed by carry trades, scores 11 against a 157 yen — the market extracts 57% above fair value from every yen-denominated purchase. No blockade changes these numbers. No tariff fixes the measurement. RTU scores predict the direction of economic gravity regardless of political noise.
The new world order will not be determined by who has the most aircraft carriers. It will be determined by who has resources, who can price them fairly, and who can settle trade without needing a dollar they don't control. Purahu doesn't pick sides. It shows the math that every side must eventually face.
The Domestic Dimension
The wealth gap between financial asset holders and wage earners is not an accident. It has a mechanism. When currencies are mispriced upward, import costs inflate. Central banks raise rates to fight the inflation. Rate hikes suppress wages and employment while they elevate the value of dollar-denominated financial assets. The top quintile holds financial assets. The bottom quintile holds wages. The structural dollar overvaluation is a continuous, invisible transfer from the bottom of the income distribution to the top — in every country that imports in dollars. RTU makes this transfer visible. Visibility is the first step to correction.
RTU v4 — Sovereign Intelligence Engine
RTU scores each economy through a proprietary multi-factor sovereign model drawing from IMF, World Bank, BIS, and Penn World Tables data — then produces a bilateral fair-trade ratio. Select a tab below to explore scores, compare currency pairs, or see the full factor matrix.
RTU Index · Lower score = stronger sovereign fundamentals · Scale reflects sovereign price pressure · Data: IMF WEO 2024 · World Bank · Penn World Tables
RTU evaluates sovereign currency strength through a proprietary multi-factor model built on macroeconomic fundamentals, real consumption behavior, and institutional quality indicators. The model integrates data from the IMF, World Bank, BIS, and Penn World Tables to produce a unified sovereign price index.
The Five Sovereign Pillars
What RTU Is Not
RTU is not a credit rating. It is not a country risk score. It is not a political index. It is a sovereign price measurement — a metric that answers one question: at what price should two economies actually exchange with each other, given their real fundamentals? That question has never had a neutral answer. RTU provides one.
Data Infrastructure
RTU draws from global institutional datasets updated annually. The selection, normalization, and integration of these sources is proprietary. The underlying raw data is public — how it becomes a sovereign price is not.
Full Methodology Access
Institutional clients and research partners may request a methodology briefing under NDA. This includes the model architecture, factor selection rationale, and validation approach — not the weights or transformation logic.
Select two currencies. RTU shows you the fundamental bilateral ratio — and how far the FX market is from that reality.
RTU bilateral ratio for every pair — how many RTU units of currency A equate to one RTU unit of currency B. Red = A is weaker (more units needed). Gold = A is stronger.
| A \ B | 🇰🇪 KES | 🇳🇬 NGN | 🇯🇵 JPY | 🇺🇸 USD | 🇩🇪 EUR | 🇨🇳 CNY | 🇮🇳 INR | 🇧🇷 BRL |
|---|
133 Nations Scored
Every country colored by RTU fair value vs. FX reality. Three categories: nations trading near fundamental value, nations systematically overpaying, and nations whose currencies are priced above their economic weight.
The Third Transition
Three transitions are happening simultaneously. Dollar unipolarity is ending. AI is automating cognitive work. Open data infrastructure now makes a sovereign measurement possible. Purahu sits at the intersection of all three.
Three Simultaneous Transitions
RTU in the AI Age
Here is the counterintuitive truth: the more AI disrupts labor markets, the more important sovereign fundamentals become. FX rates will break down as their primary anchor — labor cost differentials — gets automated away. RTU scores sovereign endowments that are not labor-dependent: reserves, debt ratios, energy access, governance quality, trade structure. These become the new basis of economic measurement in an AI world.
For American workers: wages have stagnated while financial asset prices have soared. The mechanism is the same dollar structure that extracts from Nigeria and Ethiopia. When AI displaces the cognitive middle class, the same mechanism that suppressed Global South wages for 80 years will arrive on Main Street, USA. RTU identifies this dynamic — and provides the correction mechanism.
The Resource-Driven World
The post-industrial service economy assumed that knowledge work was the highest-value, most defensible position in the global division of labor. AI invalidates this assumption. What remains irreplaceable is physical: agricultural yield, mineral extraction, coastal trade routes, hydroelectric capacity, skilled manual trades. RTU's energy diversity factor, trade balance factor, and productivity factor already measure these — precisely because they were always the real foundation of sovereign economic capacity. The AI age doesn't make RTU obsolete. It makes RTU essential.
RTU Intelligence
Every RTU Intelligence Report is built from the proprietary sovereign model applied to your specific trade corridor, bilateral relationship, or sovereign exposure. Reports are requested here — and released only with founder review. No automated delivery. No bulk subscriptions without relationship. Quality over volume.
Single sovereign analysis
Bilateral corridor analysis
Corridor or thematic deep dive
Available after your 3rd transactional report. Priority queue, standing approval for repeat country pairs, monthly briefing note.
Unlimited reports, API data access, dedicated analyst relationship, quarterly sovereign briefing. For AFDBs, sovereign wealth funds, and development banks.
Complete the form below. All requests are reviewed by the founder before any report is generated or delivered. You will receive a confirmation with your Request ID. Delivery follows approval — typically within the timeframe listed for your tier.
Your request is logged and reviewed before any report is generated.
Legal Framework
Purahu and the Real Trade Unit (RTU) provide sovereign economic measurement and analytical intelligence. RTU scores are derived from publicly available data (IMF WEO, World Bank WDI/WGI, BIS, Penn World Tables) processed through a proprietary proprietary sovereign model. RTU scores represent analytical measurements, not financial advice, investment recommendations, or legal guidance.
RTU Intelligence Reports are informational products. Nothing in any Purahu output constitutes advice to enter, modify, or exit any financial position, trade agreement, or contractual arrangement. Users are solely responsible for their decisions based on any Purahu output.
The RTU formula, all multi-factor weights, proprietary calculation methodology, and all derivative outputs are the exclusive intellectual property of Purahu. RTU™ and PURAHU+™ are trademarks. Users may not reverse-engineer, replicate, or commercially redistribute RTU scores or methodology without written authorization.
RTU scores are updated annually using IMF World Economic Outlook, World Bank World Development Indicators, World Governance Indicators, International Debt Statistics, International Comparison Program, Bank for International Settlements data, Penn World Tables (TFP series), and UNCTAD TRAINS trade data. Purahu makes no warranty as to the completeness of underlying source data.
Purahu's total liability for any claim arising from use of RTU scores or Intelligence Reports shall not exceed the amount paid for the specific report giving rise to the claim. Purahu is not liable for consequential, incidental, or punitive damages.
These terms are governed by the laws of the applicable jurisdiction. Any dispute shall be resolved by binding arbitration under binding arbitration.
Last updated: 2024. Purahu LLC.
RTU scores for all 133 countries — including nations subject to U.S. sanctions (Iran, Russia, Cuba, DPRK, Syria) — constitute informational materials protected under the IEEPA informational materials exemption. Publishing analytical scores derived from publicly available macroeconomic data does not constitute a financial service, a funds transfer, or any sanctionable transaction. This position is consistent with OFAC's published guidance on information and educational materials.
Purahu implements geographic access controls via Cloudflare to block service delivery to sanctioned jurisdictions. All paid service requests are screened against current OFAC SDN and consolidated sanctions lists prior to fulfillment. Any request from a restricted party is denied and reported as required.
RTU bilateral trade pricing enables countries to negotiate trade terms based on economic fundamentals. It does not facilitate sanctions evasion. The appropriate description of RTU settlement is: "bilateral trade priced on domestic economic fundamentals" — not "sanctions evasion mechanism" or "dollar bypass." Any use of Purahu intelligence to facilitate sanctions violations is expressly prohibited and will result in immediate termination of access.
Compliance inquiries: legal@purahu.com
The RTU formula, including all 19 factor weights, the [sovereign_base] calculation methodology, the CPI chaining approach, and the specific parameter values (μ, exponent values, cap values, floor values), constitute trade secrets under the Defend Trade Secrets Act (DTSA) and applicable state law. These weights are never disclosed in any public output, website code, or client-facing material.
PURAHU+™ and RTU™ (Real Trade Unit™) are trademarks of Purahu LLC filed with the USPTO in International Classes 36 (financial analysis services) and 42 (software as a service, data analytics). Unauthorized commercial use of these marks is prohibited.
All RTU Intelligence Reports, website content, methodology documentation, and training materials are copyright © Purahu LLC. All rights reserved. Reports purchased by clients are licensed for internal use only and may not be redistributed, published, or sold.
Users of RTU scores and Intelligence Reports may not attempt to reverse-engineer the underlying formula, weights, or methodology. Any output derived from Purahu services that is used to construct a competing methodology constitutes misappropriation of trade secrets.
Purahu maintains timestamped documentation of RTU formula development, including version history, data source selection rationale, and weight calibration records. This documentation establishes priority of invention and is maintained in secure legal custody.
Purahu collects email addresses for waitlist and report request purposes. For paid reports, we collect name, organization, email, and report specifications necessary to fulfill the service. We do not collect payment card data directly — all payment processing is handled by Stripe or equivalent PCI-compliant processors.
Report request data is retained for 7 years for compliance recordkeeping. Waitlist email addresses are retained until you unsubscribe. We do not sell, license, or share personal data with third parties except as required by law.
You may request deletion of your data at any time by emailing privacy@purahu.com. Requests are fulfilled within 30 days, subject to legal retention requirements.
Last updated: 2024. Purahu LLC.