Havana Grey (GB) was the most profitable British- and Irish-based yearling sire of 2023 according to the newly-published Weatherbys Bloodstock Sales Review. Havana Grey topped the standings with a profitability index of 10.75, comfortably ahead of the next best stallion, Sioux Nation, on 6.61. Those figures were calculated by dividing each sire's 2023 yearling average by their covering fee of 2021, when the offspring in question were conceived. It was another hugely successful year on the racecourse for the progeny of Havana Grey, with the G1 Prix Morny and G1...