This Podcast offers a comprehensive overview of modern bookmaking practices, particularly within the UK and Ireland’s horse racing industry. It explains how bookmakers construct odds by estimating probabilities and applying an “overround,” which is their built-in profit margin. The Podcast details the shift from traditional, opinion-based odds setting to exchange-based pricing, heavily influenced by platforms like Betfair and the automated trading bots that dominate these markets. Furthermore, it differentiates between fixed odds, Starting Price (SP), and Betfair Starting Price (BSP), discussing the various risk management techniques employed by bookmakers, including their methods for identifying and restricting professional bettors. Finally, the Podcast suggests avenues where punters might still find value in an increasingly efficient betting landscape.