How NPI is
calculated
A complete, transparent explanation of every decision behind the NeperCoin index. No secrets. No committees. No discretion.
WhitepaperThe Core Formula
The NPI Index is derived from a single, verifiable input: World GDP per capita, as reported annually by the World Bank. The formula has three components and no adjustable parameters.
Why 15,000?
The multiplier was chosen so at the base year (2000) the index equals exactly 15,000 — a clean anchor. This produces a token price near $3.73 at current GDP levels, making tokens globally accessible.
Why year 2000 as base?
Year 2000 represents the beginning of the modern globalization era, predating both the 2008 crisis and the COVID shock. It provides a stable, audited baseline across all 193 World Bank member nations.
The 1-Year Lag System
The index always uses GDP data confirmed at least one year prior to the update date. This eliminates every form of information asymmetry.
“By the time NPI updates, everyone already knows what the number will be. Not approximately — exactly. There is no insider advantage. There never can be.”
Data Sources
| Source | Indicator | Coverage | Role |
|---|---|---|---|
| World Bank | NY.GDP.PCAP.CD | 193 countries · Annual | Primary input |
| IMF WEO | NGDPDPC | 190 countries · Biannual | Cross-verification |
| UN Statistics | National Accounts | 200 countries · Annual | Third check |
| Chainlink | BEA GDP on-chain | BNB Smart Chain + 8 chains | Crypto verification |
| Pyth Network | BEA GDP on-chain | Multi-chain | Oracle redundancy |
The smart contract requires 4 out of 5 sources to agree within ±2% tolerance before any update executes on BNB Smart Chain.
Token & Network
| Parameter | Value |
|---|---|
| Standard | BEP-20 (BNB Smart Chain) |
| Network | BNB Smart Chain · Chain ID 56 |
| DEX | PancakeSwap · NPI/USDT pair |
| Total supply | 100,000,000 NPI (fixed forever) |
| Decimals | 18 |
| Transaction fee | ~$0.03 per transaction |
| Explorer | bscscan.com |