First Republic Bank turmoil pushes stock to plunge 95% this year as the lender seeks another lifeline from big US banks

• First Republic shares extended this week's losses, driving the stock down 95% so far in 2023. 
• The bank centered on wealthy clients was set to ask its larger rivals for more financial aid. 
• First Republic's market cap fell below $1 billion for the first time during the session. 

First Republic Bank shares continued to plunge on Wednesday, sinking to record lows as the lender reportedly seeks more financial help from larger rivals to offset a slide in deposits.

The stock fell as much as 41% to $4.76 and underwent a number of trading halts because of volatility. The loss was later pared to a still-steep decline of 29%. 

The bank's market cap for the first time fell below $1 billion following a CNBC report Wednesday that advisors to the company would look for further support from large banks that already participated in a $30 billion deposit infusion last month. 

This time, advisors are asking banks to purchase bonds from First Republic at above-market rates for a total loss of a few billion dollars. If the purchases aren't made, those banks may face fees of about $30 billion from the Federal Federal Deposit Insurance Corp. should First Republic fail, the report said.

Those banks are already facing FDIC fees stemming from the collapse and federal seizures of Silicon Valley Bank and Signature Bank last month. 

If the bond purchases are successful, advisors are optimistic others will come forward to bolster First Republic's capital and already have lined up potential buyers of new stock, sources told CNBC, which said spokespeople for First Republic and the FDIC declined to comment on its report.  

The stock has tumbled 95% so far this year, with big losses this week after the bank said it lost $100 billion in deposits in the first quarter. It was also under pressure following reports the bank was preparing to sell shares as part of a rescue plan.

First Republic ran into trouble in part on a strategy to pull in wealthy clients by offering interest-only mortgages, where the borrower didn't have to pay back any principal for the first decade of the loan, according to a Bloomberg report. 

The drop in deposits at regional banks like First Republic has fanned fears about their ability to survive as well as worries that a credit crunch affecting American consumers and businesses will worsen.