Flavor-mixing at CLEO

We discuss the latest CLEO results on B0–B̄0 and D0–D̄0 mixing. For the Bd0 system we measure the time-integrated mixing parameter, χ=0.198±0.013±0.14. From an analysis of the time structure of D0–D̄0 decays, we limit the mixing amplitude in the D0 system to x′<2.9%, without assumptions on CP-violation. Recent results from other D0 decay modes used in the study of mixing in the D0 system are presented. We looked for and did not find any CP-asymmetry in the B0–B̄0 or the D0–D0̄ systems.