MRNA is down -20.05% during the regular session, trading near $196.53 versus Wednesday's $245.81 close, wiping out roughly $20B+ in market value. Primary catalyst: partial Phase 3 data for its personalized melanoma vaccine (intismeran autogene, paired with Merck's Keytruda) leaked online ahead of Saturday's planned ESMO presentation.

Oklo shares have fallen roughly 31% over the last 30 days, sliding from about $40.18 to a recent close near $27.73. The decline extends a longer trend: OKLO is down about 37% over the trailing quarter and roughly 61% year to date.

ASTS is down -6.26% to $38.34 during regular trading, falling from a prior close of $40.90. The slide stems from a risk-off tech selloff that is hitting high-volatility space names hardest, with SpaceX and Rocket Lab also lower.

ECG dropped -9.27% during regular market hours, sliding to roughly $96 from a $106 prior close. The decline reflects continued profit-taking and valuation concerns after a sharp run-up, compounded by expected H2 EBITDA margin moderation and data-center concentration risk.

CIFR shares fell roughly 57.5% over the 30 days ended October 22, 2026, sliding from a closing price of $19.09 on September 22 to about $8.11. The steepest losses followed an $850 million convertible notes offering announced October 13, 2026, which amplified concerns about dilution and leverage.

SOXL, a 3x leveraged semiconductor ETF, fell -17.79% to $84.87 during regular trading, versus a prior close of $103.24. The slide tracked a broad AI/chip rout: Lam Research's supply-constrained guidance and Meta's raised capex reignited AI return-on-investment fears, pushing the Philadelphia Semiconductor Index down roughly -5.7%.

Amkor Technology shares have fallen roughly 27.6% over the last 30 days, sliding from a $54.59 close on September 22, 2026, to a most recent trading price near $39.53. The decline extends a longer drawdown: the stock is down about 39% over the trailing three-month period from the mid-$60s level seen in late July.

Farmers & Merchants Bancorp reported record fourth-quarter net income of $9.8 million, up 16.8% year over year, with earnings per share (EPS) of $0.71 versus $0.61 a year earlier. Full-year 2025 net income climbed 28.4% to $33.3 million, or $2.43 per diluted share, up from $1.90 in 2024.

VRT was down -7.19% intraday to $196.90, off its prior close of $212.15, during regular market hours. The primary catalyst was a broad AI-infrastructure selloff after Tesla, Lam Research, and IBM posted disappointing results, dragging data-center power/cooling peers lower.

AAOI fell -12.22% to about $67.87 during the regular session, off $9.45 from Wednesday's $77.32 close. The drop was part of a broad chipmaker-led tech selloff, with optical-networking peers Coherent, Lumentum, and Credo Technology also sliding sharply.

VTIX fell -11.54% to $0.69 during regular trading, down from a $0.78 prior-session close. The decline extends a severe downtrend—shares are down roughly -96% year-to-date and hit a fresh 52-week low.

QTEX fell -9.68% during regular trading, last near $1.40 versus a $1.55 prior close, with the decline occurring in the regular session. The move looks like profit-taking after a sharp run-up: shares gained roughly +81% over the past month and +6.16% the prior session.

RingCentral (RNG) shares traded near $81.92, up roughly 2.7% from the closing level recorded about 30 days earlier, reflecting a modest but steady advance. The stock has generally held within a range of the low-to-mid $70s to the low $80s over the trailing month, suggesting balanced supply and demand rather than a sharp directional breakout.

HSCS declined -11.24% during regular market hours to roughly $3.16, giving back a portion of the prior session's +13.7% surge. The pullback follows profit-taking after the definitive proxy filing advanced its all-stock merger with Fortitude Mining, a Zcash-focused digital asset miner, with a shareholder vote set for November 19.

EXYN is trading down -9.73% to $2.69 during regular market hours, after closing at $2.98 in the prior session. The decline is a profit-taking pullback following a roughly +64% one-week surge that lifted the robotics/AI name from about $1.96 to a $3.08 intraday high.

MKDW is down -13.12% in regular trading, sliding from a $0.5463 prior close to roughly $0.47, extending a multi-session collapse. The decline follows a -21.96% plunge in the prior session amid broad selling in Chinese-concept small caps, where MKDW ranked among the biggest decliners.

AXG is down -12.47% during regular trading hours, sliding to roughly $0.0744 from a prior close of $0.0850. The decline extends a sharp pullback from an October 19 spike as the micro-cap fintech resumes its broader downtrend.

VYGR is down -11.88% to about $1.78 in regular trading, from a prior close of $2.02. The slide extends Wednesday's -7.76% drop after Voyager unveiled a CEO succession plan: Robin Swartz becomes President, set to succeed Alfred Sandrock as CEO in Q1 2027.

ATHE is down -12.55% to $2.09, giving back a portion of its recent FDA-alignment-driven rally. The decline unfolded during regular U.S. market hours, following a weak prior close.

YOUL is trading down about -10.8% in the regular session, extending a sharp multi-day slide to fresh 52-week lows near $0.215. Primary catalyst: H1 2026 results showed +114.8% revenue growth, but gross margin fell to 8.6% from 14.1% and net profit dropped roughly -20%, weighing on sentiment.