The staking pool of NBX has historically had an average yearly reward to delegators of over 4% but this has dropped gradually in 2023, in 2024 this was around 3% and at April 2025 the yield was expected to be around 2.3%. In 2026 the historic rewards had fallen to around 2.7% and the estimated rewards at writing in July 2026 was expected to be around 2%. The annual rewards will vary depending on many variables such as on how much ADA is delegated to the staking pool. You can read more about rewards estimates here.