Updated prices at 2:40 p.m ET/ 1840 GMT
By Sinéad Carew and Shashwat Chauhan
Sept 11 (Reuters) - The S&P 500 index regained ground on Wednesday with a boost from the technology sector offsetting investor disappointment at the early morning inflation report, which crushed hopes the Federal Reserve would cut interest rates by 50 basis points week.
The S&P 500 technology index .SPLRCT reversed course after opening lower and was last up 2.4% with its biggest boost from Nvidia NVDA.O, up 6.3%. Semafor reported that the U.S. government is considering letting the AI chip company export advanced chips to Saudi Arabia .
Market sentiment was also driven by political developments the day after U.S Presidential candidate Kamala Harris put her Republican rival Donald Trump on the defensive in a combative presidential debate.
The Labor Department reported the consumer price index (CPI) rose 0.2% last month, in line with July. Core CPI , excluding volatile food and energy components, rose 0.3% on a monthly basis, exceeding economist expectations for a 0.2% rise.
This changed traders bets to a 85% probability for a 25 basis points cut by the Federal Reserve from 66% on Tuesday and the probability of a 50 basis point cut fell to 13% from 34% a day ago, according to CME Group's FedWatch tool.
"Maybe the market was looking for a softer inflation print which would give the Fed more reason to cut by 50 basis points week." said Jack Janasiewicz, portfolio manager, at Natixis. "This report was in-line to slightly hotter than expectations. As a result, this puts a bit of pressure on the Fed to cut by only 25 basis points."
As the day wore on investors may have come to terms with the inflation , according to Janasiewicz who also pointed to technology as the stand out "which has helped prop up the broader market."
At 02:40 p.m. the Dow Jones Industrial Average .DJI rose 9.60 points, or 0.02%, to 40,746.56, the S&P 500 .SPX gained 31.81 points, or 0.58%, to 5,527.33 and the Nasdaq Composite .IXIC gained 263.22 points, or 1.55%, to 17,289.10.
Among the sector laggards, consumer staples .SPLRCS was down 1% while the S&P 500 financial index .SPSY was down 0.8%.
Big U.S. lenders extended Tuesday's declines, sparked by warnings of a dip in trading revenue, a slower-than-anticipated recovery in investment banking and an expected hit to interest income from looming rate cuts.
After the Presidential debate, pricing for a Trump victory was at 48 cents on online betting site PredictIt, and at 55 cents for a Harris win.
As a result, stocks expected to perform well under a Trump presidency fell, with cryptocurrency and blockchain-related shares and prison operators lower. Trump Media & Technology Group DJT.O slumped 11.8%.
Meanwhile, solar stocks, seen as benefiting from a Harris administration, attracted some buyers. First Solar FSLR.O was up 14% while Sunrun RUN.O added 9% and SolarEdge Technologies SEDG.O was up 6.7%.
While the debate offered Wall Street little clarity on key policy issues, some market watchers see Harris' proposals to raise the corporate tax rate as likely to hit company profits, while Trump's tougher stance on tariffs could stoke inflation.
GameStop GME.N dropped almost 15% after the videogame retailer said it had filed for an offering of up to 20 million shares and reported lower second-quarter revenue.
Shares of lithium miners jumped after Chinese battery giant CATL 300750.SZ said it plans to make adjustments to lithium carbonate production in Yichun. Albemarle ALB.N, one of the largest lithium miners in the world, jumped 11.9%.
Advancing issues outnumbered decliners by a 1.01-to-1 ratio on the NYSE where there were 274 highs and 122 loww.
On the Nasdaq, 2,039 stocks rose and 2,058 fell as declining issues outnumbered advancers by a 1.01-to-1 ratio.
The S&P 500 posted 13 52-week highs and 17 lows while the Nasdaq Composite recorded 41 highs and 120 lows.
(Reporting by Sinéad Carew, Shashwat Chauhan and Lisa Mattackal in Bengaluru; Editing by Shounak Dasgupta, Maju Samuel and David Gregorio)
((sinead.carew@thomsonreuters.com; Shashwat.Chauhan@thomsonreuters.com))