Published Oct 7, 2026, 4:37 PM ET
Today's move, what drove it, and what the available information cannot explain.
Capitalisation weighted, so a move in the largest companies moves it more than a move in the smallest.
Every Nasdaq listing, weighted by capitalisation and heavy in technology.
Thirty names weighted by price rather than by capitalisation, so it can disagree with the S&P for arithmetic reasons alone.
Small capitalisation names. Read against the S&P, it is the size half of how broad a day was.
The same five hundred companies weighted equally, so the largest names count no more than the smallest. Read against the cap-weighted index, the gap is how much of the day belonged to the biggest companies.
The cap-weighted index outran the equal-weighted one, so the largest companies carried more of the session than their number.
38%
3 of 8 tracked indices above their 50-day average
Counted over ^GSPC, ^IXIC, ^DJI, ^RUT, ^FTSE, ^N225, ^GDAXI, 000001.SS. This is a reading across whole market indices, not a count of the companies inside any one of them.
CNN's own index, stored at the close. Context for whether sentiment confirms the tape or contradicts it.
Expected thirty day volatility from S&P 500 options. Rising with the index is the contradiction worth seeing.
Same-day headline flagged the stock's sharp decline as a signal, consistent with the reported drop.
Headline dated 2026-10-07: Strategy Inc Stock (MSTR) Moved Down by 6.02% on Oct 7: What Signal Does It Send? - TradingKey
Moved 6.8%, at or above the 3% floor for this strip
The evidence read for this company over the 7 days before the session was its own SEC filings, its stored corporate actions, the headline feed collected for its ticker, the clustered news events this system collects every two hours across every category and the same events that name the company in their own text. None of them holds a row for this company inside that window.
Moved 5.7%, at or above the 3% floor for this strip
Analyst called Micron undervalued ahead of its buyback program, a same-day bullish note matching the rise.
News event dated 2026-10-07, MarketWatch Top Stories: Micron stock seen as undervalued by analyst ahead of buyback program
Moved 4.1%, at or above the 3% floor for this strip
Prior-day headline noted Coinbase shares declining while the broader market improved.
Headline dated 2026-10-06: Coinbase Global, Inc. (COIN) Stock Declines While Market Improves: Some Information for Investors - Yahoo Finance
Moved 3.9%, at or above the 3% floor for this strip
The evidence read for this company over the 7 days before the session was its own SEC filings, its stored corporate actions, the headline feed collected for its ticker, the clustered news events this system collects every two hours across every category and the same events that name the company in their own text. None of them holds a row for this company inside that window.
Moved 3.7%, at or above the 3% floor for this strip
Mizuho raised its price target on Super Micro the prior session, a positive note preceding the gain.
Headline dated 2026-10-06: Mizuho Adjusts Price Target on Super Micro Computer to $43 From $35, Maintains Neutral Rating - marketscreener.com
Moved 3.4%, at or above the 3% floor for this strip
Built in code from the movers whose evidence did not resolve, so no written summary can shorten this list.
The S&P 500 fell 0.22% while the equal weight fund fell 0.81%, a 0.60 point gap, wider than the prior session's 0.01 point gap, pointing to narrower weakness across the index.
The Russell 2000 dropped 1.31% versus the S&P 500's 0.22% and the Dow's 0.66% decline, showing smaller caps underperforming the broader large cap gauges this session.
Participation held at 3 of 8 tracked indices above their 50-day average, the same reading as the prior session, even as the S&P 500 moved from a gain to a loss.
Sector returns ranged from Health Care up 1.03% to Industrials down 2.18%, a wider spread than the prior session's range of 1.31% to negative 0.34%.
One session, from the stored closes of the eleven sector ETFs. Each bar is scaled against the widest move of the day, so the shape is the spread and not an absolute size.