A surge in shares of Circle Internet Group Inc., lifted by a wave of optimism about US stablecoins, has investors and market-watchers alike wondering just how much upside could be left in the near-term for the newly publicly-traded company.

An analyst issues bullish $421 price target for Coinbase’s stock, while Fiserv’s stock moves up as stablecoin products roll out.

Fiserv on Monday unveiled plans to launch a stablecoin, joining a growing number of U.S. companies exploring the technology as the crypto asset moves into the mainstream. The announcement comes after the U.