PacWest, Western Alliance lead regional bank sell-off of more than 20% a day after Jamie Dimon said the crisis had ended

• Shares of PacWest and Western Alliance each fell more than 25%, leading bank stocks lower on Tuesday. 
• The slide follows First Republic being seized by regulators and taken over by JPMorgan this week.
• "This part of the crisis is over," JPMorgan's Jamie Dimon said after his bank took over First Republic.  

PacWest Bancorp and Western Alliance Bancorp each plunged by more than 25% on Tuesday amid a broader sell-off in regional bank stocks a day after JPMorgan chief Jamie Dimon's said that the latest leg of the crisis is over.

Shares of PacWest and Western Alliance fell as much as 26% and 27%, respectively. The S&P Regional Banks Select Industry Index fell 7%, while the KBW Regional Banking ETF fell 6%. Other banks caught in the sell-off include Zions Bancorp, which was down as much as 23%, and Fifth Third Bancorp, which fell 7%.