a Chinese quant from Citadel drew 3 formulas on a napkin that replaced my entire salary rooftop dinner in lower manhattan. friend's colleague. four drinks in he started talking about work. "weather is pure physics. no sentiment. no politics. just math against a forecast model" he grabbed a napkin. drew three formulas. > edge = p_model - p_market. > kelly f* = (W/65 - (1-W)/17) = 0.750. > EV = p_model(0.420) - p_market(0.452) = -3.2c. "three formulas. that's the whole weather desk. six analysts. $400K/year in data. doing exactly this" i pocketed the napkin. went home. opened Claude Opus 4.7. "build a weather arbitrage engine using these formulas. pull NOAA, GFS, ECMWF. enter when edge exceeds 2 cents" github.com/Jon-Becker/pre… 2,900 stars. 36GB. every trade on Polymarket and Kalshi. Opus built it overnight. 49 city pairs. 520 markets. 8 data feeds. the edge is real, this account proves it. every trade on-chain. every P&L public. pure weather. consistent returns: @automatedaitradingbot?r=enables" target="_blank" rel="nofollow noopener">polymarket.com/@automatedaitr… current positions all green: Chicago 82-83F. entry $0.184. now $1.59. +$6. Dallas 84-85F. entry $0.200. now $0.74. +$156. Seattle 52-53F. entry $0.312. now $0.59. +$114. London 18C. entry $0.267. now $2.10. +$73. Paris 20C. entry $0.300. now $1.43. +$111. 10 edges found live: > Chicago 82.4F GFS. PM odds 0.80. edge +2.3c. > Dallas 84.8F HRRR. PM odds 0.67. edge +5.3c. > London 17.9C ECMWF. PM odds 0.70. edge +8.2c. > Madrid 22.8C AEMET. PM odds 0.82. edge +6.7c. 817 trades. 84.2% win rate. kelly f+ 0.78. +$4,818 from $600 seed. Claude $20 + VPS $5. i copied his entire setup here: @1743116" target="_blank" rel="nofollow noopener">kreo.app/@1743116 texted him a week later with a screenshot. "you built this from the napkin?" Claude built it. i just typed what you wrote. "that napkin had our entire desk on it" i know. it's in my drawer.