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Every movers-explained article we have published: why each big gainer and decliner moved, written daily from the live wire. Search by ticker or keyword.

2026-08-21

Why Is ROST Stock Moving Today? ROST

Ross Stores Inc. (ROST) is moving more than 8.0% higher in premarket trading on a gap up from the prior close of $228.99 to open at $247.40. The move follows a series of analyst u…

Why Is SA Stock Down Today? SA

Seabridge Gold Inc. fell 9.23% to $30.20 in afternoon trading on August 21, 2026, marking one of the session's most notable declines. The stock opened with a 2.5% gap up but quickl…

Why Is SCCO Stock Up Today? SCCO

Southern Copper Corp (SCCO) shares rose 7.50% to $213.63 in morning trading on August 21, driven by a strong intraday move following a significant gap up at the open. The stock has…

Why Is SEI Stock Down Today? SEI

Solaris Energy Infrastructure A (SEI) fell 7.76% to $54.24 in morning trading as investors reacted to recent developments and broader market dynamics. The stock has been under pre…

Why Is SHAZ Stock Down Today? SHAZ

SharonAI Holdings Inc (SHAZ) fell 7.03% to $60.85 in afternoon trading on August 21, 2026, amid a broader market sell-off and investor concerns over recent corporate activity. The …

Why Is SLS Stock Up Today? SLS

SLS stock surged 15.37% to $15.46 on Thursday, driven by a strong intraday rally and renewed investor interest in its cancer vaccine pipeline. The stock opened with a modest 1.0% g…

Why Is SPCX Stock Down Today? SPCX

SPCX stock closed down 1.43% at $132.09 after opening higher with a 1.1% gap. The stock has traded in a volatile range during the session, reaching a high of $135.75 before fallin…

Why Is SQM Stock Up Today? SQM

SQM stock rose 6.57% to $83.69 on Monday, driven by strong second-quarter earnings and a favorable outlook for lithium demand. The company reported better-than-expected results wi…

Why Is SRE Stock Down Today? SRE

SRE stock is down 4.51% to $83.44 as of the latest trade. The decline follows a price target reduction from Morgan Stanley and a strategic asset sale. The stock opened higher but f…

Why Is SSMR Stock Up Today? SSMR

SSMR stock rose 8.74% to $18.98 on Thursday, driven by a combination of positive analyst coverage and recent insider buying activity. The stock opened with a 1.9% gap up and reach…

Why Is STDN Stock Up Today? STDN

Standard Nuclear Inc. (STDN) surged 8.35% to $12.97 in early trading on August 21 as the company announced a binding fuel supply agreement with Radiant Industries. The deal, which …

Why Is TEAM Stock Down Today? TEAM

Atlassian Corp A (TEAM) fell 3.48% to $168.83 in early trading on August 21. The decline followed a sharp intraday selloff after the open and was accompanied by a notable insider …

Why Is TEM Stock Up Today? TEM

Tempus AI Inc A stock rose 8.82% to $66.65 on Thursday, marking one of its largest intraday gains in recent months. The move followed a price target increase from BTIG analyst Mark…

Why Is TER Stock Down Today? TER

Teradyne Inc (TER) shares fell 3.29% to $370.54 in early trading, reflecting a shift in analyst sentiment and valuation concerns. The stock opened at $383.47 and quickly moved low…

Why Is TGTX Stock Up Today? TGTX

TG Therapeutics Inc stock rose 9.28% to $55.25 in early trading on August 21, driven by a combination of upgraded analyst price targets and improved sales guidance. The stock opene…

Why Is TLX Stock Down Today? TLX

Telix Pharmaceuticals ADR (TLX) fell 9.22% to $11.28 on August 21, 2026, following the release of its first-half 2026 earnings. The stock opened with a 7.4% gap down from the prev…

Why Is TXG Stock Down Today? TXG

10X Genomics Inc. (TXG) fell 2.46% to $62.30 in the session, marking a sharp reversal from a small opening gap higher. The stock opened at $64.27 but quickly declined, hitting a lo…

Why Is UBER Stock Moving Today? UBER

Uber Technologies Inc. stock is moving today after the company expanded its autonomous vehicle partnership with Baidu, marking the launch of driverless taxi services in Dubai and Z…

Why Is UI Stock Down Today? UI

Ubiquiti Inc. shares fell 8.95% to $522.50 in early trading on August 21, 2026, marking one of the most significant declines in a single session this year. The drop came despite th…

Why Is URGN Stock Down Today? URGN

URGN stock fell 6.94% to $46.80 on Thursday, driven by a strategic investment and collaboration agreement with IntraGel Therapeutics. The deal involves UroGen investing up to $7 mi…

Why Is USAR Stock Up Today? USAR

USA Rare Earth Inc A (USAR) surged 12.42% to $19.23 in a volatile session driven by a combination of market sentiment and corporate activity. The stock opened with a 4.2% gap up f…

Why Is UUUU Stock Up Today? UUUU

Energy Fuels Inc (UUUU) surged 7.39% to $14.93 in early trading on Thursday, driven by a combination of strategic business developments and market sentiment. The stock opened with …

Why Is VICR Stock Down Today? VICR

VICR stock fell 2.76% to $201.90 in the session, driven by a mix of intraday price action and recent insider activity. The stock opened with a 2.3% gap up from the prior close but…

Why Is VIRT Stock Up Today? VIRT

VIRTU Financial Inc A (VIRT) rose 8.04% to $66.11 in early trading on speculation that the firm is exploring a potential sale of its agency brokerage and technology unit. The stock…

Why Is WMT Stock Down Today? WMT

WMT stock fell 9.15% to $103.84 in a session shaped by weak U.S. sales and valuation concerns. The decline followed Walmart's latest earnings report, which showed a slowdown in U.S…

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