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Oliver Buchannon
Arc Quantum

Leading daily newsletter for quantum equities

S&P Global just called it

Apr 17, 2026

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2 min read

S&P Global just called it

S&P Global says quantum is "catalyzed." Xanadu halted four times. The institutional thesis is here.

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Arc Quantum
Washington turned the money on

Apr 16, 2026

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2 min read

Washington turned the money on

The bill that died in 2023 is back. And it's loaded.

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Arc Quantum
You thought yesterday was good?

Apr 15, 2026

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5 min read

You thought yesterday was good?

Happy world quantum day (to those who celebrate)

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Arc Quantum
Quantum just shrugged off Hormuz

Apr 14, 2026

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4 min read

Quantum just shrugged off Hormuz

Posts Monday at 9 am EST

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Arc Quantum
 Cramer Calls D-Wave a "Science Project"

Apr 13, 2026

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4 min read

Cramer Calls D-Wave a "Science Project"

Geopolitical chaos returns as the ceasefire collapses and oil tensions spike.

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Arc Quantum
Sector Gives Back Wednesday's Gains. IonQ Lands 256-Qubit Sale

Apr 10, 2026

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4 min read

Sector Gives Back Wednesday's Gains. IonQ Lands 256-Qubit Sale

The ceasefire rally fades as quantum stocks retreat 2-5%.

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Arc Quantum
Sector Surges 5-10%. Rigetti Finally Gets Its Day

Apr 9, 2026

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6 min read

Sector Surges 5-10%. Rigetti Finally Gets Its Day

The market woke up to the 108-qubit launch as broader geopolitical relief lifts all boats.

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Arc Quantum
Rigetti Launches 108-Qubit System

Apr 8, 2026

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6 min read

Rigetti Launches 108-Qubit System

The first 100+ qubit gate-based system hits Amazon Braket while analyst trimming continues.

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Arc Quantum
Mizuho Cuts Targets. ARQQ Drops 5%. The Rally Takes a Breather.

Apr 7, 2026

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6 min read

Mizuho Cuts Targets. ARQQ Drops 5%. The Rally Takes a Breather.

Sector consolidates after last week's run as analysts reset expectations.

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Arc Quantum
Chamath Sounds the Alarm: Quantum Could Drain Bitcoin in 7 Years

Apr 6, 2026

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8 min read

Chamath Sounds the Alarm: Quantum Could Drain Bitcoin in 7 Years

The sector extends its rally while VCs warn the clock is ticking. IonQ's cash burn comes under scrutiny.

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Arc Quantum
D-Wave Powers a Blockchain Testnet. The Sector Rips 5%

Apr 3, 2026

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6 min read

D-Wave Powers a Blockchain Testnet. The Sector Rips 5%

IonQ takes a 13.3% stake in Horizon Quantum. All six tickers green.

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Arc Quantum
Zacks Crowns D-Wave "Bear of the Day"

Apr 2, 2026

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6 min read

Zacks Crowns D-Wave "Bear of the Day"

Sector gives back Tuesday's gains. EPS estimates crash, bookings fall 22%, and profitability remains distant.

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Arc Quantum
Google Says Quantum Could Crack Bitcoin in 9 Minutes. The Sector Ripped 11%.

Apr 1, 2026

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6 min read

Google Says Quantum Could Crack Bitcoin in 9 Minutes. The Sector Ripped 11%.

$100B in crypto at risk. US pressures allies on supply chains. Rigetti lands an academic sale.

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Arc Quantum
QUBT Hits a Milestone. The Stock Dropped 6.5%.

Mar 31, 2026

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5 min read

QUBT Hits a Milestone. The Stock Dropped 6.5%.

BlackRock bets $57M on another quantum IPO. The sector bleeds on with no news.

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Arc Quantum
$930 Million Out the Door. Insiders Know Something.

Mar 30, 2026

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7 min read

$930 Million Out the Door. Insiders Know Something.

Xanadu goes public anyway. IonQ hits 52-week low. Vanguard exits D-Wave completely.

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Arc Quantum
IBM Cracks the "Impossible." Pure-Plays Crater Anyway.

Mar 27, 2026

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6 min read

IBM Cracks the "Impossible." Pure-Plays Crater Anyway.

D-Wave -9%, IonQ -6%, Rigetti -5%. When validation feels like a warning shot.

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Arc Quantum
Rigetti bets $100M on the UK. The stock drops 3%.

Mar 26, 2026

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7 min read

Rigetti bets $100M on the UK. The stock drops 3%.

Google goes dual-track on quantum. D-Wave bounces but earns a "Strong Sell." Plus: IonQ's government push and why QTUM might be the safest play right now.

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Arc Quantum
D-Wave launches podcast while down 49%. QUBT quietly wins the day.

Mar 25, 2026

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8 min read

D-Wave launches podcast while down 49%. QUBT quietly wins the day.

Government unit, defense demos, and a podcast can't stop the slide. Plus: IonQ profit-taking, Arqit's 5.6% drop, and the only green ticker in the group.

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