Higher-Order Corrections to Electroweak Precision Observables in the MSSM

Recent results on precision observables in the Minimal Supersymmetric Standard Model (MSSM) are summarised. The calculation of the leading electroweak Yukawa corrections of , O(αtαb), is briefly described and a new one-loop result for MW containing the complete dependence on all complex phases is discussed. The currently most accurate evaluation of MW in the MSSM, containing all available higher-order contributions, is presented. The sensitivities of the electroweak precision data to the possible scale of supersymmetry are discussed.