Bulk magnetization data taken on amorphous Fe16Ni64B19Si1and Fe20Ni60B20alloys in the temperature range 0.9  TC≤T≤1.4  TCreveal that the magnetization data satisfy the generalized equation of state, which takes into account the relevant and irrelevant scaling fields and is based on the nonlinear variables &egr;˜=(T−TC)/T=&egr;/tandh˜=H/t(wheret=T/TC), whereas the initial susceptibility data obey the modified Curie‐Weiss law in the entire temperature range. Moreover, the present results provide a strong evidence for weak itinerant ferromagnetism in the alloys in question.