CSTL - Latest News
Castle Biosciences, Inc. (CSTL), operates in Healthcare / Medical - Diagnostics & Research, trades on NASDAQ.
Market capitalization stands near $1.00B. Beta to the broader market is 0.94.
The article list below shows the most recent CSTL headlines from major financial news vendors. For options traders, the most actionable items are earnings releases, analyst rating changes, M&A activity, and regulatory filings - each can drive a meaningful repricing of implied volatility and shift dealer hedging flow. Pair the news context with the implied-volatility skew and gamma exposure views to see whether the options market has already priced in the headline.
Recent CSTL Headlines
Castle Biosciences Inc (CSTL) Shares Fall 4.8% -- What GF Score of 80 Tells Investors
gurufocus.com - Oct 12, 2026
Castle Biosciences Valuation AssessmentOn October 12, 2026, Castle Biosciences Inc (CSTL) shares fell 4. 8% to $32.
ACG 2026 Data Show TissueCypher® Identifies Elevated Risk of Progression Beyond Pathology Findings in Barrett's Esophagus
prnewswire.com - Oct 12, 2026
Studies highlight how molecular risk assessment with TissueCypher can help inform surveillance and treatment decisions beyond biopsy findings alone FR
Castle Biosciences (NASDAQ:CSTL) Stock Price Down 6.1% Following Insider Selling
defenseworld.net - Oct 6, 2026
Shares of Castle Biosciences, Inc. (NASDAQ: CSTL - Get Free Report) fell 6.
Castle Biosciences (NASDAQ:CSTL) Insider Tobin Juvenal Sells 1,034 Shares of Stock
defenseworld.net - Oct 2, 2026
Castle Biosciences, Inc. (NASDAQ: CSTL - Get Free Report) insider Tobin Juvenal sold 1,034 shares of the company's stock in a transaction that occurr
Late-Breaking EADV 2026 Data Support Use of DecisionDx®-Melanoma in SLNB Decision-Making and Risk-Aligned Post Surgical Management
prnewswire.com - Sep 30, 2026
Data show patients with low-risk DecisionDx-Melanoma i31-SLNB results had sentinel lymph node (SLN) positivity below 5% when biopsied, and eligible pa
How News Affects CSTL Options Pricing
Headlines and scheduled events drive implied volatility in two distinct ways. Pre-event, IV typically inflates as uncertainty about the outcome rises; this is the implied-volatility expansion that creates the long-vol setup. Post-event, IV typically contracts sharply as uncertainty resolves; this is IV crush, which makes premium-selling structures profitable when they survive the underlying move. The size of the crush depends on how stretched pre-event IV is relative to the realized move. Track CSTL's implied vs realized volatility over the news cycle to size pre-event vs post-event positioning. For ticker-level dealer positioning context, the gamma exposure view shows whether dealers are positioned to amplify or dampen post-news moves.
Frequently asked CSTL news questions
- What is the latest CSTL news headline?
- The most recent CSTL headline (Oct 12, 2026) is "Castle Biosciences Inc (CSTL) Shares Fall 4.8% -- What GF Score of 80 Tells Investors". The five most recent stories with summaries and publication times are listed above, sourced from major financial news vendors.
- How fresh is the CSTL news on this page?
- News rows refresh roughly every 30 minutes during the trading day. The five most recent headlines are listed in publication-time order. Press releases from the company itself typically appear within minutes of the wire release; third-party reporting may lag by 30-60 minutes depending on the source.
- What CSTL news moves options pricing?
- Three categories move single-name IV most aggressively: scheduled earnings releases (priced into pre-event IV, crushed post-event), unscheduled M&A or strategic announcements (rapid IV expansion, slower decay), and regulatory or legal events (drug-trial readouts, antitrust filings, FDA approvals). Routine news flow (analyst commentary, sector rotation) typically does not move IV meaningfully unless it triggers a cluster of rating changes.
- How can I track unusual CSTL options activity related to news?
- Unusual options activity often precedes news by hours to days; the canonical signals are volume substantially above the trailing average concentrated in a small number of strikes, atypical put/call skew, and aggressive execution (at-the-ask sweeps or block prints). Cross-reference the per-ticker gamma-exposure and volume-history pages with the news flow above to triangulate informed vs uninformed flow.