- RBLX -26.85% was the single biggest move across all cap tiers — led the downside on the mid-cap tier.
- Two-way tape — 4 cap tiers had an up-mover and 4 had a down-mover.
- Spread between the biggest up and biggest down move was 42.2 percentage points — wide dispersion.
These are the biggest stock movers from Friday’s US session (July 31, 2026) — one up and one down for each market-cap tier. RBLX -26.85% led overall in the mid-cap bucket. Each ticker block has the catalyst (or an honest “no clear catalyst” if there isn’t one) plus what a pattern-recognition algorithm would actually flag in the move — base breakout, momentum continuation, failed breakdown, sympathy selloff, or noise.
Mega-cap movers (Companies above $200B)
↑ AMZN +15.32%
$271.58 · Mega-cap · $34.2B traded
Why: Amazon surged after a blowout Q2 report where AWS cloud revenue growth re-accelerated, validating the company’s massive AI infrastructure spending and sending shares to all-time highs.
Pattern: Massive earnings gap on enormous volume breaks AMZN out of a multi-month consolidation range — classic momentum continuation setup if it holds above the gap-up open level.
↓ AAPL -7.35%
$308.91 · Mega-cap · $39.4B traded
Why: Apple sold off sharply after earnings flagged rising memory costs pressuring iPhone margins, while CEO Cook warned tariff headwinds are a ‘100-year flood’ with no clear end.
Pattern: Heavy-volume gap down from near highs breaks the prior uptrend structure — looks like a distribution event rather than a buyable dip until price finds a new support base.
Large-cap movers ($10B to $200B)
↑ CRWD +3.05%
$190.86 · Large-cap · $1.4B traded
Why: CrowdStrike drifted higher alongside broader cybersecurity sector strength and continued AI-driven Falcon platform narrative — no single catalyst, more of a sector momentum day.
Pattern: Modest gain on average volume within a sideways range — no breakout signal yet, just noise inside a multi-week consolidation between roughly $180 and $200.
↓ COIN -10.59%
$146.26 · Large-cap · $3.0B traded
Why: Coinbase plunged after reporting a third consecutive quarterly loss, with weak crypto trading volumes dragging revenue below expectations and weighing on sentiment.
Pattern: Earnings gap down on elevated volume slices through recent support — bearish continuation pattern with no visible base-building, suggesting further downside risk near term.
Mid-cap movers ($2B to $10B)
↑ ASAN +4.65%
$8.32 · Mid-cap · $44M traded
Why: No clear catalyst — Asana gained modestly on light volume with no major news, likely drifting with broader software sector flows rather than any company-specific event.
Pattern: Low-conviction move on thin dollar volume at sub-$10 levels — looks like noise in a beaten-down name rather than any meaningful pattern setup worth tracking.
↓ RBLX -26.85%
$35.60 · Mid-cap · $2.2B traded
Why: Roblox cratered nearly 27% — its worst day ever — after Q2 earnings disappointed on bookings growth and user monetization metrics, triggering a broad analyst downgrade wave.
Pattern: Enormous earnings gap down on massive volume obliterates months of price structure — this is a broken-chart reset, not a mean-reversion setup, until a new base forms.
Small-cap movers ($300M to $2B)
↑ MVIS +10.83%
$0.27 · Small-cap · $1M traded
Why: No clear catalyst — MicroVision bounced modestly on very thin volume at penny-stock levels, likely driven by retail flow or short-covering rather than any fundamental development.
Pattern: Sub-dollar stock with minimal dollar volume — moves at this level are dominated by bid-ask spread noise and don’t fit any reliable technical pattern framework.
↓ RIOT -8.82%
$20.17 · Small-cap · $422M traded
Why: Riot Platforms fell ahead of its Q2 earnings report as Bitcoin mining difficulty dropped and broader crypto weakness from Coinbase’s miss dragged the mining sector lower.
Pattern: Crypto-correlated selloff on solid volume continues a choppy downtrend — no base structure in place, just a momentum-driven sector sympathy move tracking Bitcoin sentiment.
Today’s biggest stock movers — bottom line
Friday’s tape was mixed — even split between up- and down-movers across the cap tiers. The Movers recap drops daily Tue-Sat morning Melbourne time, covering the prior US session’s biggest stock movers in every cap tier — mega, large, mid, and small.
Read next: Daily Stock Movers · Gamma Squeeze Mechanics · What Is a P/E Ratio?
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