Financial stocks enjoyed broad gains Monday, with the sector the best performer of the S&P 500's /zigman2/quotes/210599714/realtime SPX -0.07% 11 major sectors, after J.P. Morgan Chase & Co. /zigman2/quotes/205971034/composite JPM -0.45% raised its outlook for net interest income (NII). The SPDR Financial Select Sector ETF /zigman2/quotes/209660484/composite XLF -0.56% charged 3.8% higher in midday trading, with all 66 equity components gaining ground. The group was led by J.P. Morgan Chase & Co.'s stock /zigman2/quotes/205971034/composite JPM -0.45% , which shot up 7.5%, to also pace the Dow Jones Industrial Average's /zigman2/quotes/210598065/realtime DJIA +0.27% gainers, after the bank raised its 2022 NII outlook to more than $56 billion from more than $53 billion. The stock's gain, which is on track to be the biggest since it soared 13.5% on Nov. 9, 2020, comes after it closed Friday at an 18-month low. Among some of the other top gainers in the financial ETF, shares of Citigroup Inc. /zigman2/quotes/207741460/composite C -0.23% climbed 7.4%, Bank of America Corp. /zigman2/quotes/200894270/composite BAC -1.24% hiked up 6.6% and Wells Fargo & Co. /zigman2/quotes/203790192/composite WFC -1.17% ran up 5.9%.