Dow, S&P 500, Nasdaq soar as inflation cools, bank profits shine

U.S. stocks rose on Wednesday as high hopes for bank earnings paid off and key consumer inflation data showed key prices rose less than expected in December.

The benchmark S&P 500 Index (^GSPC) rose more than 1.7% and the Dow Jones Industrial Average (^DJI) gained more than 1.6%. Meanwhile, the tech-heavy Nasdaq Composite Index (^IXIC) surged 2.3%.

Stocks rose after the Consumer Price Index (CPI) showed progress towards the Federal Reserve's 2% inflation target in December.

Excluding volatile food and natural gas costs, "core" prices rose 0.2% month-on-month, slowing from November's 0.3% rise. Compared with the same period last year, core CPI rose 3.2%.

The annual core consumer price index (CPI) has been rising at 3.3% for the past four months as of the latest release. December was the first time since July that the indicator reflected slower price growth.

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The 10-year Treasury yield (^TNX) fell more than 12 basis points to around 4.66% after the weaker-than-expected data. The index has risen to its highest level in more than a year, posing headwinds for stocks. The Russell 2000 index of rate-sensitive small-cap stocks (^RUT) surged along with it, rising 1.6%.

Traders still see only a 3% chance of the Fed cutting interest rates in January, according to the CME FedWatch tool. They remain divided on whether to cut interest rates in the second half of this year, with a rate cut in June now looking more likely.

Read more: What the Fed's rate cuts mean for bank accounts, certificates of deposit, loans and credit cards

Spirits were also boosted by earnings reports from Wall Street banks, which delivered soaring profits on the back of a trading recovery and strength in investment banking. JPMorgan Chase & Co. (JPM) posted record profits for the second year in a row, meeting analysts' optimistic expectations, while Goldman Sachs (GS) also beat profit forecasts. BlackRock (BLK), Wells Fargo (WFC) and Bank of New York (BK) also booked large quarterly orders.

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