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OpenAgriculture · Growing-season heatWeather index future · simulation

Sao Paulo growing degree days · Week 48 · Nov 23 - Nov 29

Growing degree days at SBGR · 7 local days, 2026-11-23 to 2026-11-29 · trading closes 11-29 03:00 (15 d)

Market index
83.2°C-days
Long 48.4¢ · Short 51.6¢ per share
Model fair
84.8 ± 14.2
priced 23 min ago
Edge
+1.6
fair minus market
Volume
669
15 traders
Open interest
621 / 716
long / short shares
30 · long pays 0long pays 1 · 140
Market 83.2Model fair 84.8
Listed at 85.9 · quoted by a market maker, no order book · one share moves 0.0091 sUSDT per index point

Real-asset futures that follow this index

simulated prices

Each contract below is a commodity price index the demo simulates: 100 on the day it was listed, moved by this contract's GDD and by a simulated market factor. Weather-implied is the price at the index this market is trading at now; when it differs from the asset's own market price, simulated spread traders trade the two against each other.

ContractMarket priceWeather-implied
COFF-SBGR-26W48Coffee93.73long 44¢98.10
SUGR-SBGR-26W48Sugar cane101.38long 52¢100.01

How the index builds, day by day

ForecastBeyond the forecast

Each bar is one local day's contribution to the index. Days on the final record count as they stand; the rest are the model's estimate, with a whisker one standard deviation either way.

0102011-2311-2411-2511-2611-2711-2811-29
Day-by-day table
DaySourceHighLowGDDRunning total
Mon, Nov 23Forecast27.5°C17.3°C12.2 ± 2.812.2
Tue, Nov 24Forecast28.5°C18.7°C13.1 ± 2.925.3
Wed, Nov 25Forecast27.0°C20.4°C13.4 ± 3.338.7
Thu, Nov 26Forecast28.4°C17.2°C12.3 ± 3.251.0
Fri, Nov 27Forecast24.2°C17.0°C10.6 ± 3.861.5
Sat, Nov 28Forecast24.8°C18.1°C11.3 ± 4.072.9
Sun, Nov 29Beyond the forecast25.5°C18.9°C12.0 ± 4.084.8

Market index path

one step per trade · dashed line: model fair now
62.477.592.5

Recent trades

TimeTradeSharesAmountAvg price
11-13 18:50Buy long88.5441.8847.3¢
11-13 17:50Buy long22.0110.1145.9¢
11-13 15:50Buy shortpair12.426.7354.2¢
11-13 12:50Buy shortpair19.7610.6353.8¢
11-13 12:50Buy long133.9560.0044.8¢
11-13 11:50Buy long105.5344.1741.9¢
11-13 05:50Buy longpair9.894.0040.5¢
11-13 03:50Buy longpair12.445.0040.2¢
11-13 02:50Buy short15.769.4259.8¢
11-13 01:50Buy shortpair19.1911.3959.4¢
11-13 01:50Buy longpair16.406.6740.7¢
11-13 01:50Buy long53.4621.3039.8¢
11-12 23:50Buy long134.0850.4437.6¢
11-12 21:50Buy longpair24.358.7135.8¢
11-12 20:50Buy short94.6260.0063.4¢

A trade marked pair is one leg of a simulated spread trade: the other leg is in a real-asset contract that follows this index.

Settlement

This contract settles on the sum of the station's daily records, as soon as the oracle marks all 7 days final and settleable - no earlier than 11-30 06:00. If a day of the period cannot settle, the contract is void and every position is refunded at cost.

Contract specification

Symbol
GDD-SBGR-26W48
Index
Growing degree days (GDD), in °C-days
Formula
(high + low) / 2 - 10 with both held to 10..30 °C, summed over the period
Station
SBGR · Sao Paulo
Period
Week 48 · Nov 23 - Nov 29 · 7 local days, 2026-11-23 to 2026-11-29
Band
30 to 140
Payoff
Long: (index - 30) / 110 sUSDT per share, held to 0..1. Short: 1 minus that.
Point value
0.0091 sUSDT per share per index point
Trading closes
2026-11-29 03:00 UTC
Settles from
2026-11-30 06:00 UTC
Settlement source
The station's daily record, final and settleable, from the Weather Market oracle
Hedges
Agriculture - Sugar cane, Coffee (the exposure it hedges; this contract settles on the index)
Trade GDD-SBGR-26W48

Long gains if GDD finishes above the level you pay for.

Virtual sUSDT only. No monetary value.

Rules in short
  • Long gains when the index finishes higher, short when it finishes lower. A long and a short share together always pay 1 sUSDT.
  • Outside the band 30 to 140 the contract pays as if the index had finished on the edge.
  • You pay in full when you buy. What you paid is the most you can lose: no margin, no liquidation.
  • You can sell back to the market maker at any time before trading closes, when the last day of the period begins.
  • Void, with every position refunded at cost, if any day of the period cannot settle on the record.
Full rules →