The four major U.S. stock indices rose on Monday, with the Nasdaq Composite increasing by more than 1.5% and the Philadelphia Semiconductor Index rising by 3.03%, while TSMC’s ADR soared over 2%.

Investor optimism around the potential for de-escalation in the conflict between Israel and Iran, coupled with a drop in previously soaring oil prices, contributed to the market's gains. On the 13th, Israel launched airstrikes against Iran, destroying multiple military, oil storage, and nuclear facilities, which led to missile retaliation from Iran and an escalation of the conflict.

However, U.S. NBC News reported that Iran has conveyed messages through countries like Saudi Arabia, requesting President Trump to pressure Israel into a ceasefire. In exchange, Iran expressed a willingness to show greater flexibility in nuclear negotiations, temporarily alleviating market concerns regarding the escalation of the conflict.

Major technology and semiconductor stocks performed well, with NVIDIA rising by $2.72, a gain of 1.92%, to close at $144.69; Tesla up $3.82, a gain of 1.17%, closing at $329.13; and TSMC ADR climbing $4.55, a gain of 2.16%, to end at $215.65.

At the close on Monday, the Dow Jones Industrial Average rose by 317.3 points, up 0.75% to close at 42515.09 points; the S&P 500 climbed 56.14 points, up 0.94% to 6033.11 points; the Nasdaq rose 294.39 points, up 1.52% to 19701.21 points; and the Philadelphia Semiconductor Index increased by 155.05 points, up 3.03% to finish at 5267.30 points.