Gives another star to, perhaps

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

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