Alters an assessment

• Downgrades, e.g
• Considers bond values again
• Changes a grade
• Awards another star to, perhaps
• Changes at Standard & Poor's, say
• Gives another star to, perhaps
• Changes a review
• Changes at Standard & Poor's, say
• Gives a new value to

Wiktionary Word definitions in Wiktionary
vb. (en-third-person singular of: rerate )