Financial-technology company Fiserv will launch a stablecoin and digital-asset platform for its clients by the end of the year, the company announced Monday, sending the stock higher. The move will give Fiserv’s network,

Mastercard said it was expanding its relationship with Fiserv to promote the financial tech company's planned stablecoin, FIUSD.

Wall Street’s enthusiasm for stocks with exposure to the rapidly growing world of stablecoins continued on Monday, as shares of Fiserv rallied after the financial-technology giant entered the arena.