Nasdaq falls 5.5% in a single week, Brent crude approaches $110.

Wall Street was rattled by a double blow from AI infrastructure financing risks and rising oil prices. Over the week, the Nasdaq 100 fell 5.5% cumulatively, marking its largest weekly decline since the tariff turmoil of April 2025. The Philadelphia Semiconductor Index slid for eight consecutive trading sessions, dropping about 16% over the period—its longest losing streak since 2008. Market concerns over CoreWeave's AI infrastructure financing costs, returns on capital expenditure, and debt-servicing capacity pushed yields on some of the company's bonds above 15% at one point. On Friday, CoreWeave shares fell 12%, bringing their cumulative decline from this year's high to more than 50%. Meanwhile, Cathie Wood's ARK Investment Management chose to add to its positions in CoreWeave and Cerebras Systems. Brent crude climbed to around $1 per barrel.