Ioanna Stamatiou

Dr. Ioanna Stamatiou grew up in Thessaloniki, where the grain comes off the Macedonian plain and leaves through the port, and where half her family was in shipping. She read mathematics at the Aristotle University, then did the thing the family understood — freight — chartering dry-bulk cargoes of corn, wheat, and soybeans out of Piraeus, learning that a cargo is a weather bet with a delivery date attached.

She moved onto the paper side in her late twenties, joining the risk team of an oilseed and grain desk in Geneva. The traders had intuition; what they did not have was a model that told them how wrong they could be. She built it. Over eleven years she became the person the desk came to before a position was sized — not to be told the price, but to be told the distribution of prices, and where the position sat in its left tail.

Her scars are specific. A long new-crop corn book sized off a flat forecast that ignored the way volatility ramps into the US growing season. A soybean crush spread hedged on a model calibrated to the old-crop curve, so the harvest break in the forward curve quietly unwound the hedge. A cocoa exposure that looked diversified until a single West-African supply shock proved it was one weather system in a trench coat.

She now works independently, building simulation and risk frameworks for trading houses and merchants who have outgrown spreadsheet fair-values but distrust black boxes. She writes everything so the trader who has to run it can read it. Her first instruction to anyone new on a desk: price the distribution, not the number, and size for the tail you did not forecast.