Khumbo Thindwa and Nelson Dzupire (2025) “Pricing Rainfall Derivatives Based on a Hidden Markov Model to Mitigate Poor Yield”, African Journal of Education,Science and Technology (AJEST), 8(3), pp. 30–44. Available at: https://ajest.org/index.php/ajest/article/view/862 (Accessed: 17 April 2026).