Performance Index Rating (PIR) is a basketball statistical formula that is used by the Euroleague Basketball Company's first and second tier competitions, the EuroLeague and the EuroCup, as well as various European national domestic and regional leagues. It is also variously referred to as Performance Index Ranking, Rating, Ranking, Evaluation, Valuation, and Efficiency. It is similar to, but not exactly the same as, the NBA's Efficiency (EFF) stat.