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OpenPower · Cooling demandWeather index future · simulation

Hong Kong cooling degree days · November 2026

Cooling degree days at VHHH · 30 local days, 2026-11-01 to 2026-11-30 · trading closes 11-29 16:00 (16 d)

Market index
167.2°C-days
Long 48.0¢ · Short 52.0¢ per share
Model fair
161.9 ± 16.8
priced 23 min ago
Edge
-5.3
fair minus market
Volume
309
10 traders
Open interest
264 / 352
long / short shares
100 · long pays 0long pays 1 · 240
Market 167.2Model fair 161.9On the record 106.0 (13 of 30 days) - the index cannot finish below this
Listed at 170.2 · quoted by a market maker, no order book · one share moves 0.0071 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 CDD 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
LNG-VHHH-NOV26LNG for power96.28long 45¢96.86

How the index builds, day by day

Final recordForecastBeyond 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.

081511-0111-0411-0711-1011-1311-1611-1911-2211-2511-28
Day-by-day table
DaySourceHighLowCDDRunning total
Sun, Nov 1Final record31.0°C26.0°C10.510.5
Mon, Nov 2Final record31.0°C25.0°C10.020.5
Tue, Nov 3Final record30.0°C26.0°C10.030.5
Wed, Nov 4Final record31.0°C26.0°C10.541.0
Thu, Nov 5Final record31.0°C26.0°C10.551.5
Fri, Nov 6Final record31.0°C26.0°C10.562.0
Sat, Nov 7Final record29.0°C26.0°C9.571.5
Sun, Nov 8Final record29.0°C25.0°C9.080.5
Mon, Nov 9Final record27.0°C20.0°C5.586.0
Tue, Nov 10Final record23.0°C17.0°C2.088.0
Wed, Nov 11Final record24.0°C17.0°C2.590.5
Thu, Nov 12Final record28.0°C22.0°C7.097.5
Fri, Nov 13Final record29.0°C24.0°C8.5106.0
Sat, Nov 14Forecast28.9°C21.0°C7.0 ± 1.8113.0
Sun, Nov 15Forecast27.3°C19.4°C5.3 ± 1.8118.3
Mon, Nov 16Forecast24.9°C20.2°C4.6 ± 1.8122.9
Tue, Nov 17Forecast26.0°C21.9°C5.9 ± 1.9128.8
Wed, Nov 18Forecast24.7°C16.9°C2.9 ± 1.9131.7
Thu, Nov 19Forecast19.4°C14.9°C0.5 ± 1.0132.2
Fri, Nov 20Forecast22.9°C14.7°C1.4 ± 1.7133.6
Sat, Nov 21Forecast23.5°C17.9°C2.9 ± 2.3136.5
Sun, Nov 22Forecast23.1°C17.0°C2.5 ± 2.3139.0
Mon, Nov 23Forecast21.6°C14.9°C1.4 ± 1.9140.3
Tue, Nov 24Forecast23.5°C14.5°C1.9 ± 2.3142.3
Wed, Nov 25Forecast24.6°C16.2°C2.9 ± 2.8145.2
Thu, Nov 26Forecast24.2°C17.3°C3.3 ± 3.1148.5
Fri, Nov 27Forecast25.4°C16.7°C3.6 ± 3.3152.1
Sat, Nov 28Forecast24.7°C17.4°C3.6 ± 3.4155.7
Sun, Nov 29Beyond the forecast23.4°C17.0°C3.1 ± 3.3158.8
Mon, Nov 30Beyond the forecast23.4°C17.0°C3.1 ± 3.3161.9

Market index path

one step per trade · dashed line: model fair now
153.5169.1184.8

Recent trades

TimeTradeSharesAmountAvg price
11-13 16:50Buy longpair17.078.1547.8¢
11-13 14:50Buy short117.6760.0051.0¢
11-13 12:50Buy longpair18.279.1850.3¢
11-13 12:50Buy short38.6719.1449.5¢
11-13 09:50Buy short72.4734.8648.1¢
11-13 00:50Buy long36.0618.8852.4¢
11-12 21:50Buy short76.6436.1347.1¢
11-12 20:50Buy short18.878.6746.0¢
11-12 19:50Buy shortpair10.774.9145.6¢
11-12 19:50Buy long27.9515.1554.2¢
11-12 12:50Buy long33.9918.1653.4¢
11-12 05:50Buy shortpair16.807.8646.8¢
11-12 02:50Buy long18.8910.0553.2¢
11-12 01:50Buy long112.1557.8251.6¢

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 30 days final and settleable - no earlier than 11-30 19:00. If a day of the period cannot settle, the contract is void and every position is refunded at cost.

Contract specification

Symbol
CDD-VHHH-NOV26
Index
Cooling degree days (CDD), in °C-days
Formula
max(0, (high + low) / 2 - 18), summed over the period
Station
VHHH · Hong Kong
Period
November 2026 · 30 local days, 2026-11-01 to 2026-11-30
Band
100 to 240
Payoff
Long: (index - 100) / 140 sUSDT per share, held to 0..1. Short: 1 minus that.
Point value
0.0071 sUSDT per share per index point
Trading closes
2026-11-29 16:00 UTC
Settles from
2026-11-30 19:00 UTC
Settlement source
The station's daily record, final and settleable, from the Weather Market oracle
Hedges
Power - Electricity, LNG for power (the exposure it hedges; this contract settles on the index)
Trade CDD-VHHH-NOV26

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 100 to 240 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 →