  The charge and baryon balance functions are studied in the coalescence
hadronization mechanism of quark-gluon plasma. Assuming that in the plasma
phase the $q\bar{q}$ pairs form uncorrelated clusters whose decay is also
uncorrelated, one can understand the observed small width of the charge balance
function in the Gaussian approximation. The coalescence model predicts even
smaller width of the baryon-antibaryon balance function:
$\sigma_{B\bar{B}}/\sigma_{+-}= \sqrt{2/3}$.
