Learn · Rewards & Accuracy

IQR vs PCT reward bands

FTSO providers aren't paid for showing up — they're paid for being accurate. Accuracy rewards are split across two bands measured against the consensus median every round.

Two bands, 40 / 60

• Primary — the IQR band (≈40% of accuracy rewards). The interquartile range is the spread of the middle 50% of providers by vote weight. It's narrow when everyone agrees and wide when they don't. Landing inside it is the real differentiator — it moves with the market.
• Secondary — the PCT band (≈60%). A fixed half-width in parts-per-million set per feed by governance (tight for stablecoins, wider for volatile assets). Easier to hit; the baseline.

The 40/60 split is a governance parameter (set in FIP.11). Both bands pay out proportionally to a provider's (capped) weight.

Why "weighted" changes everything

The quartiles are computed on a weight axis, not a head-count. Providers are sorted by submitted price; weight is accumulated; Q1 is the price where cumulative weight first passes 25%, Q3 where it passes 75% (a step function — no interpolation, with ties broken deterministically). A handful of heavy providers can define the band, so a light provider has to track the heavy cluster, not the simple average.

The 2.5% cap

No single provider's weight can exceed 2.5% of the total when bands and payouts are computed; the excess is redistributed. This keeps one large entity from defining "consensus" by itself — and it's why reward rate per delegated FLR can be higher with a strong mid-sized provider than with the very largest. See Delegation 101.

The same idea, live

Below is BTC/USD from the live network — the gold line is the consensus median, the inner band the IQR, the outer band the secondary band, and the bright dots are Seraphim FTSO's own submissions. Switch to % deviation to see how tight "agreement" really is.

Seraphim FTSO submission

Last reviewed June 2026