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OpenPower · Cooling demandWeather index future · simulation

Miami cooling degree days · Week 48 · Nov 23 - Nov 29

Cooling degree days at KMIA · 7 local days, 2026-11-23 to 2026-11-29 · trading closes 11-29 05:00 (15 d)

Market index
50.3°C-days
Long 41.9¢ · Short 58.1¢ per share
Model fair
31.9 ± 14.3
priced 23 min ago
Edge
-18.4
fair minus market
Volume
356
7 traders
Open interest
204 / 482
long / short shares
0 · long pays 0long pays 1 · 120
Market 50.3Model fair 31.9
Listed at 58.5 · quoted by a market maker, no order book · one share moves 0.0083 sUSDT per index point

How the index builds, day by day

ForecastBeyond the forecast

Each bar is one local day's contribution to the index. Days with a final NWS climate report count as they stand (shown as final record); a day whose report is not out yet uses the METAR figure and is marked not final; the rest are the model's estimate, with a whisker one standard deviation either way.

081511-2311-2411-2511-2611-2711-2811-29
Day-by-day table
DaySourceHighLowCDDRunning total
Mon, Nov 23Forecast80.6°F69.4°F6.0 ± 3.26.0
Tue, Nov 24Forecast72.9°F61.9°F2.4 ± 2.68.3
Wed, Nov 25Forecast73.9°F58.3°F2.0 ± 2.510.3
Thu, Nov 26Forecast78.3°F71.1°F5.8 ± 3.716.2
Fri, Nov 27Forecast79.9°F73.4°F6.9 ± 4.023.1
Sat, Nov 28Beyond the forecast75.2°F67.8°F4.4 ± 3.827.5
Sun, Nov 29Beyond the forecast75.2°F67.8°F4.4 ± 3.831.9

Market index path

one step per trade · dashed line: model fair now
24.746.668.5

Recent trades

TimeTradeSharesAmountAvg price
11-13 18:50Buy short68.1639.0357.3¢
11-13 16:50Buy short38.8921.7656.0¢
11-13 14:50Buy short70.6838.5954.6¢
11-13 10:50Buy short72.5738.3352.8¢
11-13 03:50Buy short118.9960.0050.4¢
11-12 20:50Buy long121.0960.0049.5¢
11-12 19:50Buy long83.0939.0547.0¢
11-12 12:50Buy short62.6033.3453.3¢
11-12 10:50Buy short49.6825.7651.9¢

Settlement

KMIA is a US station, so this contract settles on the NWS daily climate report (CLI) of each of its 7 days: the index is the sum built from the high and low the National Weather Service prints. The local forecast office issues each report after local midnight, normally within one to three hours, and the contract settles one day after the last report is issued - about 12-01 07:00. A corrected report replaces the earlier one and the day runs again from it. If any day has no final report three days after the period ends, the contract is void and every position is refunded at cost. NWS CLI Watch ↗

Contract specification

Symbol
CDD-KMIA-26W48
Index
Cooling degree days (CDD), in °C-days
Formula
max(0, (high + low) / 2 - 18), summed over the period
Station
KMIA · Miami
Period
Week 48 · Nov 23 - Nov 29 · 7 local days, 2026-11-23 to 2026-11-29
Band
0 to 120
Payoff
Long: (index - 0) / 120 sUSDT per share, held to 0..1. Short: 1 minus that.
Point value
0.0083 sUSDT per share per index point
Trading closes
2026-11-29 05:00 UTC
Settles
One day after the NWS climate report for the last day is issued
Settlement source
The NWS daily climate report (CLI) of each day, as carried by the Weather Market oracle
Hedges
Power - Electricity, LNG for power (the exposure it hedges; this contract settles on the index)
Trade CDD-KMIA-26W48

Long gains if CDD 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 0 to 120 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.
  • A US station: the index is built from the high and low in the NWS daily climate report of each day, and the contract settles a day after the last of those reports is issued. Void, with every position refunded at cost, if any day has no final report three days after the period ends.
Full rules →