[Someone]

”if we attribute this 4% delta entirely to the announcement, the market is guessing the actual penalty will amount to $1.84B”

No, the market’s guess is $1.84B higher today than it was yesterday. The latter likely isn’t zero, as https://en.wikipedia.org/wiki/UBS_tax_evasion_controversies#... states ”In July 2014, the bank was required to post a bond of 1.1 billion euros, which UBS complied with while making multiple appeals in the French court system, finally losing its appeal at the Cour de Cassation, France's highest court”