When a stock drops 11% in a day, most investors head for the exit. Michael Burry went shopping.
The “Big Short” investor used Monday’s selloff in Fiserv (FISV) to add to his position, buying more stock at approximately $48.50 per share. The drop came after the company announced that CEO Mike Lyons was stepping down immediately to take the top job at Truist Financial (TFC), ending a 13-month tenure.
In a post on his Substack “Cassandra Unchained,” Burry described the CEO departure as a “thesis violation” — but made clear that doesn’t automatically mean sell. “Thesis violation does not mean sell. It means re-evaluate,” he wrote.
The stock has now fallen roughly 79% from its 52-week high of $226, sitting below $48 at the time of writing. Burry called it a “dog of a stock” — and said that’s exactly why it’s interesting.
“In something like this, buying very cheap is important,” he wrote. FISV is now one of his larger positions, sitting at roughly 5% to 7% of his portfolio, in line with his holdings in MercadoLibre (MELI) and Birkenstock (BIRK).
Burry’s bull case rests on Fiserv’s underlying business, which he argues is intact despite the chaos at the top.
He pointed to the company’s bank core processing unit, which carries a 99% client retention rate and high switching costs — what Burry called “practically a license to print money.” Fiserv processes around 10,000 transactions per second, serves 1.8 billion issuer accounts, and reaches roughly 95% of U.S. households.
He also flagged Clover, Fiserv’s merchant payments platform, as a growth engine. With around 900,000 merchants and deep ties to Fiserv’s existing banking clients, Clover has a distribution advantage that competitors like Block, Toast, Stripe, Shift4, and Adyen find hard to replicate.
Burry noted that elevated trading volume in FISV for months prior may have been signaling a bottoming process. “The business itself runs just fine no matter who is CEO,” he said.
Fiserv named Takis Georgakopoulos as the new CEO. He previously served as Co-President and Head of Merchant Solutions and Technology — putting him directly in charge of Clover before the promotion.
Before Fiserv, Georgakopoulos spent 17 years at JPMorgan Chase, most recently as Global Head of Payments. He also worked as a partner at McKinsey & Company.
Burry said he sees the leadership change as potentially a positive: “The new CEO seems to have technology expertise in payments that the old one did not.”
Lyons himself was Fiserv’s second CEO in quick succession — he had replaced Frank Bisignano, who departed in May 2025.
Burry also suggested that some of FISV’s prior underperformance was tied to “aggressive accounting and short-term sales tricks” under previous leadership that needed to be unwound.
Fiserv holds the No. 1 spot in the 2025 IDC FinTech 100 for the third straight year and counts 3.9 million small businesses and 7,000 enterprise-level clients across one million locations among its customer base.
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