US benchmark equity indexes were higher intraday as traders appeared to shake off worries about the Middle East conflict and higher oil prices.
The S&P 500 was up 0.3% at 7,421.2 after midday Monday, while the Dow Jones Industrial Average and the Nasdaq Composite rose 0.2% each to 49,691.7 and 26,308.6, respectively. Among sectors, energy paced the gainers, while communication services saw biggest drop.
West Texas Intermediate crude jumped 3.7% to $98.98 a barrel, while Brent advanced 3.5% to $104.87, as US President Donald Trump rejected Iran's counteroffer to end the war, extending uncertainty around oil flows through the Strait of Hormuz.
The US-Iran ceasefire is on "massive life support" and "unbelievably weak," news outlets reported Monday, citing Trump. On Sunday, Trump described Iran's response to Washington's peace proposal as "totally unacceptable."
Iran's proposal, delivered via mediator Pakistan, sought an immediate end to hostilities, the lifting of the US naval blockade of its ports and assurances against further aggression, BBC News reported, citing Iran's semi-official Tasnim news agency.
"While optimism for an imminent deal is fading, there remains a glimmer of hope that talks between Trump and Chinese President Xi (Jinping) later this week could yield positive results on Iran," ING Bank said in a note Monday.
Trump is scheduled to arrive in China Wednesday for a high-stakes state visit, with talks set to take place Thursday and Friday.
US Treasury yields were higher intraday Monday, with the 10-year rate up 4.7 basis points at 4.41% and the two-year rate rising 4.2 basis points to 3.94%.
In company news, some big technology names were advancing, with Nvidia (NVDA) up 2.6%, the second-biggest gainer on the Dow. Micron (MU) and Qualcomm (QCOM) also saw sizable gains.
Some 89% of S&P 500 companies have reported quarterly results in the latest cycle, with earnings up about 25% from a year earlier and revenue rising 10%, Oppenheimer Asset Management said in a note. Ahead of the earnings season, FactSet put expected earnings growth at 12.6% year over year.
Cisco Systems (CSCO) and Applied Materials (AMAT) are among the major names scheduled to report this week.
Lumentum (LITE) shares surged 17% intraday Monday, the top gainer on the S&P 500, after the company said it is set to join the Nasdaq-100 index, effective May 18.
Trade Desk (TTD) shares were down 7.1%, the worst performer on the S&P 500, after HSBC downgraded the stock to reduce from hold while adjusting its price target to $20 from $31.
In economic news, US existing home sales increased less than projected in April, data from the National Association of Realtors showed.
"Despite mixed macroeconomic signals -- including a record-high stock market and historically low consumer confidence -- home sales were modestly boosted by the continued improvement in housing affordability," NAR Chief Economist Lawrence Yun said.
Gold was down 0.2% at $4,722.50 per troy ounce, while silver jumped 6.2% to $85.90 per ounce.



