U.S. stock futures rose slightly on Wednesday, ahead of a pivotal interest rate decision from the Federal Reserve that could mark the start of a new cycle of interest rate hikes in the coming months, according to CNBC.

Futures for the Standard & Poor's 500 and Nasdaq 100 rose 0.3% and 0.6% respectively, while futures linked to the Dow Jones Industrial Average climbed about 161 points, or 0.3%.

Markets are pricing in a 92.7% probability of a 25-basis-point rate hike at Wednesday's meeting, according to the Chicago Board of Trade's FedWatch tool. The probability of an additional 25-basis-point hike at the Fed's October meeting was around 41%, compared to 27% for the December meeting. The current target range for the federal funds rate is 3.5%-3.75%.

The annual inflation rate, as measured by the Consumer Price Index (CPI), registered 3.4% in August, down from a recent high of 4.2% in May. On a monthly basis, the CPI rose 0.4% last month, in line with expectations, while core inflation, which excludes more volatile categories such as food and energy, increased by 0.3%, exceeding forecasts.

Brent Welsey, chief investment officer at Welsey Asset Management, said that the Fed keeping interest rates unchanged could have negative repercussions.

He added: This could surprise stocks, and surprises are rarely welcomed in the markets. It could also damage the credibility of the Fed and reignite fears that the central bank is under political pressure to keep interest rates unchanged.

The central bank's decision on Wednesday comes amid pressure from the White House to keep interest rates at their current levels.

Welsey said: “One of the biggest obstacles to reducing inflation is the high price of diesel, which could lead to increased costs in many sectors of the economy, from transportation and agriculture to shipping.”

He added: While raising interest rates will not lower diesel prices, higher interest rates may help to calm inflation in other parts of the economy, thus offsetting the inflationary impact of higher energy prices.

Diesel prices in the United States surpassed $6 a gallon on Friday for the first time, amid continued supply constraints stemming from the wars in Ukraine and Iran.

Crude oil prices are holding above $100 a barrel, despite retreating from recent highs. Brent crude futures, the global benchmark, fell more than 1% to around $107 a barrel, while U.S. West Texas Intermediate crude futures dropped 2% to around $103 a barrel.

US Treasury yields are rising sharply amid expectations of rising prices in the economy, with the 10-year bond yield recording a level just below 5%, while the 30-year bond yield reached 5.346%.

Against a tense geopolitical backdrop, U.S. stocks fell sharply on Tuesday, with the S&P 500 index dropping 0.45% and the tech-heavy Nasdaq Composite losing 0.78%.

Most semiconductor, cloud service provider, and other select technology stocks declined on Tuesday, following weekend discussions among the heads of major language model companies, during which they indicated the possibility of slowing down the pace of product launches.