Stocks making the biggest moves midday: Boeing, Amkor, Corning, Sandisk, Iqvia & more
Midday movers included Boeing (+~5%) after Q2 revenue of $24.56B beat estimates, Amkor (-24%) on weaker Q3 guidance ($1.95B-$2.05B), and memory chip declines with Roundhill Memory ETF (DRAM) down >8% and Sandisk -13%. Iqvia rose ~12% after raising guidance. Corning fell ~16% on cautious revenue outlook; PayPal, Coca-Cola, Sherwin-Williams and others also moved on earnings.
How this was made

The 30-second read
Why it matters
The most tradable catalysts are same-day guidance misses or raises (Amkor, Corning, IQVIA, Sherwin-Williams, Coca-Cola) and sector-driven weakness (memory complex, photonics sympathy).
Market read
Traders can use the guidance and settlement details to reassess near-term expectations and risk for the named movers during the session.
What to watch
For several names, the article omits guidance details or segment drivers; traders should verify whether management issued specific forward commentary beyond the cited revenue/EPS guidance.
Background
This is a midday market wrap highlighting large intraday movers tied to earnings results, guidance, and a major legal settlement.
Ticker impact
Boeing shares rose about 5% after second-quarter revenues narrowly topped estimates, despite a wider-than-forecast adjusted loss.
Choppy-to-positive bias as traders weigh revenue beat versus weaker profitability.
The article cites a revenue beat and a larger adjusted loss, which typically drives initial relief followed by scrutiny of cost structure and guidance.
Amkor Technology shares tumbled 24% after issuing weaker-than-expected third-quarter guidance versus FactSet expectations.
Further weakness possible if investors extrapolate the guide into demand and pricing.
A large same-day drop tied directly to specific top-line guidance below consensus is a clear, actionable repricing signal.
SanDisk plunged 13% for a third consecutive session as memory chip stocks broadly sold off.
Near-term downside pressure likely persists while memory ETF weakness continues.
The article attributes the move to broader memory-chip weakness rather than SanDisk-specific news, limiting precision.
IQVIA rallied 12% after better-than-expected second-quarter results and raised full-year earnings and revenue guidance.
Bias toward continued outperformance over coming sessions as guidance reduces uncertainty.
The article explicitly states both results beat and guidance hikes, which are typically strong drivers of follow-through.
Corning shares plunged 16% despite beating second-quarter expectations, after current-quarter revenue guidance missed forecasts.
Downside continuation risk until management provides clearer visibility on the current quarter.
A large move is directly linked to guidance missing analyst forecasts, which is usually the key driver for repricing.
PayPal gained 4% after second-quarter adjusted EPS and revenue both topped LSEG consensus estimates.
Mild-to-moderate upside bias, with follow-through dependent on any additional forward commentary not included here.
The catalyst is a same-day earnings beat with specific numbers, but the absence of guidance limits conviction.
Coca-Cola shares popped 5% after adjusted EPS and revenue beat expectations and the company hiked its full-year outlook.
Sustained positive bias likely, especially if the market treats the outlook hike as durable.
The article includes both beat and outlook increase, but does not quantify the magnitude of the outlook change.
Sherwin-Williams rose 8% after raising full-year adjusted earnings guidance and topping second-quarter estimates.
Potential continuation higher if traders extrapolate the raised range into estimates.
The article provides a specific raised EPS range versus consensus, which is a solid driver, but no segment detail is given.
Market effects
Memory and photonics names are pressured by sector-wide weakness, while software and payments show resilience via earnings beats.
Primarily US large-cap and semiconductor complex sentiment during the session.
Semiconductor packaging and memory weakness can spill into broader global supply-chain and demand expectations.
Counterpoint
Some declines (UPS, Rambus) despite beats suggest the market may be reacting to forward-looking items not captured here, so selling solely on the headline move could be premature.
Key entities
- companyBoeing
Second-quarter revenues narrowly topped estimates; adjusted loss was wider than forecast.
- companyAmkor Technology
Third-quarter top-line guidance range came in below consensus, triggering a sharp selloff.
- companyIQVIA
Beat results and raised full-year earnings and revenue guidance; highlighted record net new bookings.
- companyCorning
Beats on second-quarter lines but current-quarter revenue guidance missed forecasts, driving a large drop.
- companyJohnson & Johnson
Agreed to settle thousands of talc lawsuits for $5.5 billion combined.


