Banks are increasingly weary of stablecoins in a post Genius Act market. (Photo by Michael M. Santiago/Getty Images)Getty ImagesU.S. banks are intensifying efforts to ensure stablecoin issuers cannot earn yield, warning lawmakers that allowing rewards would drain deposits and destabilize lending. But stablecoin advocates argue the campaign is less about protecting financial stability and more about protecting a $187 billion annual profit engine that banks derive from payment processing fees.The fight, now u ...