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Apple is the world’s most valuable company again, after gaining $400 billion yesterday

The iPhone maker rose more than 15% on its best day since 1998.

Apple just added nearly $400 billion to its market cap, with shares soaring more than 15% on Wednesday — the company’s biggest single-day gain since 1998, per CNBC.

To put that jaw-dropping ~$400 billion surge into perspective, it’s nearly as much as the market cap of Netflix ($404 billion) and just shy of a slew of consumer giants like McDonald’s, Starbucks, Adidas, and Domino’s combined.

Apple market cap gain chart
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Obviously, the rally was only really possible on the back of Apple’s worst four-day slide since 2000, which wiped out nearly a year’s worth of market gains, triggered by fears around President Trump’s sweeping reciprocal tariffs.

Yesterday’s surprise announcement of a 90-day pause on those tariffs seriously flipped Apple investors’ collective mood, though how long that will last is unclear. The proposed levies would still slam Apple’s sprawling overseas supply chain, which stretches across Vietnam, India, Malaysia, and Ireland, if they land in July.

On the face of it, Apple fans imitated the wider market yesterday by acting like China — where 90% of iPhones are produced — didn’t just get hit by a fresh 125% reciprocal tariff, up from the previous 104%, amid the wider reprieve. The company itself doesn’t have the luxury of operating under the same illusions, having ramped up production in India before being forced to hurriedly ship 600 tons of iPhones back earlier this week.

Despite Wednesday’s surge, Apple shares are still down 5% over the past week, though it has at least reclaimed its crown from Microsoft as the world’s most valuable company... for now.

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Arista Networks Reports Q3 Earnings

Arista Networks beats expectations, but stock dives on mediocre guidance

All those data centers are going to need a lot of switches and routers as well as GPUs.

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AMD posts top- and bottom-line beat in Q3 with Q4 sales guidance ahead of estimates

Advanced Micro Devices reported third-quarter results that exceeded analysts’ expectations on the top and bottom lines, with guidance to match.

  • Adjusted diluted earnings per share: $1.20 (compared to an analyst consensus estimate of $1.17)

  • Revenue: $9.25 billion (estimate: $8.74 billion, guidance: $8.4 billion to $9 billion)

  • Data center revenue: $4.34 billion (estimate: $4.14 billion)

  • Adjusted gross margin: 54% (estimate: 54%, guidance: 54%)

Its Q4 guidance for sales of $9.3 billion to $9.9 billion was strong relative to the anticipated $9.2 billion, while its adjusted gross margin outlook of 54.5% is bang in line with estimates.

Even so, shares are off about 2% in after-hours trading as of 4:24 p.m. ET.

“AMDs strong 3Q sales beat and 4Q outlook were likely driven by stronger PC and server CPU demand — similar to Intels results — along with continued share gains,” Bloomberg Intelligence analysts Kunjan Sobhani and Oscar Hernandez Tejada wrote. “The GPU ramp-up remains ahead of expectations, aided by a gaming rebound.”

AMD has had a high-profile Q4 so far, striking a megadeal with OpenAI that its CFO said “is expected to deliver tens of billions of dollars in revenue.” That announcement prompted more than 20 price target hikes from Wall Street analysts in a 24-hour span.

The company followed that up with a pact with Oracle, which said it would deploy 50,000 of AMD’s new flagship chips in data centers starting in the second half of next year. On the upcoming conference call, the Street will be looking for as much color as possible on the sales outlook for those MI450 chips.

Ahead of this release, Morgan Stanley analyst Joseph Moore wrote:

“The focus should remain on MI450. AMDs rack scale solution shipping next year is the key, and we are excited to see what the company can do. Its still early to make market share assessments, and while the Open AI agreement is clearly an accelerant, the reliance on cloud providers to ramp those 6 gigawatts still creates some uncertainty. Ultimately, to drive share gains, the company will need to provide better ROI than NVIDIA can offer, and customers still raise questions about that given lower rack density and the need to resolve ecosystem issues.

The chip designer was the third-best-performing member of the VanEck Semiconductor ETF in 2025 heading into this report, with shares having more than doubled year to date.

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