U.S. stocks rose across the board on Monday, led by major technology names, as bitcoin climbed above $86,000 and falling oil prices and Treasury yields boosted sentiment, according to Sina Finance. The Dow gained 366.18 points, or 0.71%, to 52,048.82; the S&P 500 rose 114.20 points, or 1.49%, to 7,764.70; and the Nasdaq added 599.54 points, or 2.26%, to 27,122.09. The Nasdaq 100 climbed 838.18 points, or 2.83%, to 30,482.35. The Philadelphia Semiconductor Index rose 4.29%, its best single-day performance since August 4. All of the "Magnificent Seven" closed higher, with Meta up over 11%, its largest single-day gain since April last year; Tesla up over 3%; Nvidia up over 2%; Google, Amazon and Microsoft up over 1%; and Apple modestly higher. Semiconductor chip stocks surged, with ARM up over 17%, its biggest single-day gain since April last year; Intel up over 12%, its largest gain since May; AMD up about 10% to a new high, with its market capitalization topping $1 trillion for the first time, ranking 16th among global listed companies by total market value and becoming the fourth U.S. chip company to join the "trillion-dollar club"; and Qualcomm up over 9%, its biggest single-day gain since May. Optical communications stocks rose sharply, with Astera Labs up over 12%, Credo up over 6%, and Corning and Marvell Technology up over 5%. Bitcoin reached an eight-month high, and crypto-related stocks rose collectively, with Strategy up over 9%. Warner Bros. Discovery (WBD) rose over 10%, its largest single-day gain since October last year, driven by its acquisition deal with Paramount Skydance. International oil prices fell sharply on the 21st; at the close, New York light crude futures for October delivery fell $4.52 to $95.78 per barrel, down 4.51%, while London Brent crude futures for November delivery fell $3.53 to $100.34 per barrel, down 3.4%. After the latest escalation of Middle East hostilities over the weekend, Iran-backed Houthi forces said they attacked Saudi Arabia with missiles and drones on Saturday. Later that day, the U.S. State Department warned Americans to reconsider travel to the Middle East as the U.S. and Iran threatened to resume strikes. However, U.S.-Iran diplomacy remains possible in the near term, with President Trump telling Fox News he may be willing to meet Iranian President Pezeshkian during this week's U.N. General Assembly. U.S. Treasury yields declined alongside oil, with the 10-year yield down more than 4 basis points to 4.951% and the 30-year yield falling to 5.284%. The Federal Reserve last week raised interest rates for the first time in three years as the U.S. works to contain stubborn inflation and elevated bond yields. The economic and earnings calendar is relatively light this week, with markets closely watching artificial intelligence, following an article by Anthropic CEO Dario Amodei that surfaced a long-brewing debate over whether frontier AI labs should slow the pace of model development.