(Updates with market moves at the end of the day, and other changes, if any.)
The Dow Jones Industrial Average hit an all-time high on Monday as Wall Street extended its rally into the third day, while hopes for a US-Iran deal sent oil prices lower.
The Dow rose 1.3% to 53,178.41, notching a record closing high. The Nasdaq Composite advanced 2.1% to 25,913.90, while the S&P 500 climbed 1.5% to 7,600.50. Most sectors were in the green, led by communication services' 4.3% jump, while energy led the laggards.
West Texas Intermediate crude oil tumbled 5.2% to $80.29 a barrel in Monday late-afternoon trade, while Brent dropped 4.7% to $83.80.
President Donald Trump said Monday that the US is in talks with Iran. He previously called off a planned attack against Tehran.
"Hopes of a peace deal in the Middle East weighed on crude prices," D.A. Davidson said Monday in a note.
However, Iranian Foreign Ministry spokesperson Esmail Baghaei on Monday ruled out an immediate plan to negotiate with Washington, according to news reports. Tehran was in talks with Oman regarding the Strait of Hormuz, the world's most important chokepoint for crude flows, Baghaei reportedly said.
Treasury yields were lower, with the 10-year rate down 6.1 basis points at 4.68% and the two-year rate falling 3.7 basis points to 4.25%.
In company news, Boeing (BA) shares jumped 8%, the best performer on the Dow. The planemaker has received the US Federal Aviation Administration's clearance for its 737 Max 7, paving the way for the model's launch after nearly a decade of regulatory review.
Atkore (ATKR) jumped 28% after the electrical products manufacturer announced a $3.8 billion deal to be acquired by Italian cable maker Prysmian.
Marriott International (MAR) was the worst performer on the S&P 500, down 7%. The hotel giant reported second-quarter revenue below Wall Street's estimates amid headwinds related to the Middle East conflict, while it provided a downbeat earnings outlook for the ongoing three-month period.
Major companies including SpaceX (SPCX), Eli Lilly (LLY), Advanced Micro Devices (AMD), Caterpillar (CAT), Merck (MRK), McDonald's (MCD), Walt Disney (DIS), Shopify (SHOP) and Uber Technologies (UBER) are slated to release their quarterly results this week.
In economic news, the US manufacturing sector continued to grow in July, with Institute for Supply Management data indicating the fastest expansion rate in more than four years and S&P Global (SPGI) signaling steady growth pace.
Spot gold edged up 0.2% to $4,052.94 per troy ounce, while silver rose 1% to $58.34 per ounce.



