Bitcoin miners dominated Thursday's close, with MARA up 13.5%

As seen on the 24/7 Wall St. homepage on September 18, 2026.

Biggest movers · At the close Sep 18, 4:10pm ET

Gainers

MARAMarathon Digital$13.21+13.5%
SNDKSanDisk$1,787.02+10.7%
CIFRCipher Mining$18.27+7.9%
COHRCoherent$318.27+7.5%
IRENIren$46.53+7.0%

Losers

SMRNuScale Power$8.32-7.9%
IQiQIYI$1.01-7.7%
ASANAsana$9.45-6.4%
QCOMQualcomm$178.02-5.7%
GMGeneral Motors$82.35-4.9%

Bitcoin miners owned Thursday's close, led by Marathon Digital finishing 13.5% higher, with Cipher Mining and Iren both up 7% or more. Large-cap losses ran heavier than usual, with Qualcomm off 5.66% and General Motors down 4.93%.

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Marathon Digital was the clear standout at Thursday's close, finishing up 13.5% to $13.21, with Cipher Mining and Iren also higher and making bitcoin mining the most concentrated pocket of strength in the session.

SanDisk posted the second-largest gain among the day's movers, rising 10.69% to $1,787.02, while Coherent also closed higher in a top-five where every gainer cleared 7%.

Qualcomm fell 5.66% to $178.02 and General Motors dropped 4.93% to $82.35, declines large enough to matter to index-level investors. Keep an eye on both stocks in the sessions ahead.

NuScale Power led the losers, falling 7.91% to $8.32, with iQIYI and Asana also lower. The sell-off spanned nuclear power, streaming, software, semiconductors, and autos, pointing to sector-specific pressure.

Sources

Mentioned: MARA, SNDK, CIFR, COHR, IREN, SMR, QCOM, GM

Related Market Updates

the bitcoin-mining race · 3y 6:00pm ET

$10K invested in each — worth today:

IREN$108.9K10.9×

MARA$11.9K1.2×

Same sector, same three years: $10,000 in Iren is worth $108,872 today, while the same bet on Marathon Digital sits at $11,854. Picking the right bitcoin miner mattered nearly 11x more than picking the trade.

SMR NuScale Power

6:00pm ET

New 52-week low $7.32 -3.6% vs prior low · 2026-07-29

NuScale Power set a new 52-week low at $7.32, 3.6% under the prior floor from late July, the same day Pomerantz announced a fraud investigation into the company.

Biggest movers · At the close 4:11pm ET

Gainers

ACNAccenture$208.79+6.2%
ASANAsana$9.82+5.3%
MPCMarathon Petroleum$463.74+4.9%
FIGFigma$22.65+4.7%
CAVACava$54.51+4.7%

Losers

AAOIApplied Optoelectronics$105.33-14.1%
COHRCoherent$302.69-9.5%
ALABAstera Labs$346.2-9.4%
CRWVCoreWeave$81.5-7.9%
IRENIren$35.66-7.8%

Optical and data center names filled four of the five worst spots at this close, led by Applied Optoelectronics at -14%. Accenture's 6.2% gain was the best of a far tamer upside.

Biggest movers · On the open 9:51am ET

Gainers

PLTRPalantir$202.22+4.2%
BPBP$46.25+3.9%
EQNREquinor$43.09+3.6%
EENI$55.81+3.4%
TTETotalEnergies$87.1+3.4%

Losers

ARGXargenx$827.17-10.9%
CIFRCipher Mining$13.9-4.5%
ARMArm$281.35-4.4%
AAOIApplied Optoelectronics$117.25-4.3%
IRENIren$37.19-3.9%

argenx is down 10.91% at the open, more than double any other decliner in a 382-stock universe. Palantir leads the gainers at 4.17%, with Big Oil names filling out the rest.

Biggest movers · On the open Oct 7, 9:51am ET

Gainers

STZConstellation Brands$118.36+2.3%
MPCMarathon Petroleum$442.3+2.3%
CVECenovus Energy$31.91+2.1%
DVNDevon Energy$48.9+1.8%
PSXPhillips 66$274.67+1.8%

Losers

SMRNuScale Power$7.55-5.9%
FUTUFutu Holdings$106.56-5.9%
DBDeutsche Bank$33.15-5.7%
OPENOpendoor Technologies$2.15-5.3%
MARAMarathon Digital$10.43-5.0%

NuScale Power is off 5.9% at today's open, with four other names down more than 4.9% and the best gainer, Constellation Brands, up just 2.3%. Refiners and energy fill out the rest of the green.

Activist stake · 13D Bitfury Top HoldCo B.V.

Oct 6, 8:00pm ET

Amended 6.2%of Cipher Digital Inc.

Bitfury, Cipher Mining's founding shareholder, is still holding 25.6 million shares and filing with activist intent after distributing much of its position. That makes it a voice with leverage at a $6 billion miner heading into a brutal year for hash price economics.

Biggest movers · On the open Oct 6, 9:51am ET

Gainers

CEGConstellation Energy$300+12.1%
SMRNuScale Power$8.27+7.7%
MRVLMarvell Technology$288.1+6.2%
AAOIApplied Optoelectronics$128.77+5.9%
ALABAstera Labs$381.06+5.2%

Losers

STXSeagate Technology$831.22-6.3%
SKHYSK hynix Inc.$188.84-3.2%
IQiQIYI$1-2.4%
SNDKSanDisk$1,675-1.7%
MUMicron Technology$1,046.76-1.6%

Constellation Energy opened 12.1% higher at $300, the biggest move across 385 priority names, with NuScale Power close behind. Storage is on the other side of the ledger: Seagate down 6.3%, SanDisk and Micron also lower.

Biggest movers · On the open Oct 2, 9:50am ET

Gainers

ONON Semiconductor$85.07+6.2%
HOODRobinhood$118.02+6.2%
MARAMarathon Digital$11.9+6.2%
BEBloom Energy$293.61+5.8%
MSTRMicroStrategy$169.41+5.5%

Losers

STXSeagate Technology$805.97-14.8%
WDCWestern Digital$415.36-10.2%
LNGCheniere Energy$260.59-4.3%
APPAppLovin$270.73-3.8%
SNDKSanDisk$1,727.07-3.4%

Storage names are taking the brunt of the open, with Seagate down 14.8%. On the other side, ON Semiconductor leads the gainers, leaving the spread across this stock universe at roughly 21 points in a single session.

Biggest movers · At the close Oct 1, 4:10pm ET

Gainers

ACNAccenture$211.97+15.6%
SNPSSynopsys$490.81+12.8%
COHRCoherent$318.52+10.7%
AAOIApplied Optoelectronics$107.16+8.0%
LITELumentum$1,043.95+7.5%

Losers

AMCAMC Entertainment$2.75-8.2%
TEMTempus AI$76.51-6.6%
BRKRBruker$61.76-4.6%
DHRDanaher$211.34-4.6%
NWGNatWest Group$17.36-4.3%

Three names in our 383-stock board closed with double-digit gains, led by Accenture's 15.6% jump to $211.97, a move that size is rare for a mega-cap consultant. The downside was far tamer, with AMC's 8.2% slide the worst of it.

Reddit's most-discussed stocks · Sep 30 Sep 30, 9:35am ET

1MUbullish417 comments · 1.7K upvotes
2SKHYbullish203 comments · 1.1K upvotes
3NVDAsplit308 comments · 902 upvotes
4SNDKbullish106 comments · 745 upvotes
5AMZNsplit296 comments · 1.1K upvotes

UBERheating up

MSFTsouring fast

Memory is where the crowd is parked today: Micron drew 417 comments, with Sandisk and SK Hynix riding the same AI storage trade. Nvidia and Amazon are drawing arguments on both sides, Uber chatter is heating up, and Microsoft is souring fast.

Biggest movers · At the close Sep 28, 4:10pm ET

Gainers

AMCAMC Entertainment$3.26+10.9%
PANWPalo Alto Networks$391.51+4.5%
RBRKRubrik$113.08+3.2%
GPROGoPro$1.32+2.3%
IDXXIDEXX Laboratories$529.68+2.0%

Losers

ARMArm$284.01-8.5%
DASHDoorDash$178.15-7.9%
ACHRArcher Aviation$5.19-7.6%
QCOMQualcomm$187.7-7.1%
DUOLDuolingo$134.08-6.6%

AMC Entertainment's 10.88% jump to $3.26 was the only double-digit move of the session, and the downside was where the size was: five names finished off more than 6%, led by Arm at -8.48%. Chip and consumer-tech leaders took the brunt of it.

Biggest movers · At the close Sep 25, 4:10pm ET

Gainers

ONON Semiconductor$77.19+5.5%
FNFabrinet$418.14+5.0%
DELLDell Technologies$561.77+4.8%
QCOMQualcomm$203.09+4.5%
SMCISuper Micro Computer$43.21+4.1%

Losers

ZSZscaler$193.43-9.9%
SSentinelOne$22.34-6.8%
IRENIren$44.11-4.4%
RBRKRubrik$109.41-3.9%
PANWPalo Alto Networks$375.02-3.8%

Chips and hardware took the top five slots at Thursday's close, led by ON Semiconductor's 5.52% gain, while every big decliner but one was a cybersecurity name. Zscaler's 9.88% drop to $193.43 was the worst in the group.