Published Oct 12, 2026, 4:32 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 two moved together, so the session was not a story about the largest companies.
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.
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. Rows naming this company were read inside that window and none of them was resolved to this session's move.
Moved 9.1%, 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 5.0%, at or above the 3% floor for this strip
Heavy options bets on a 30% rally in Snap shares align with the session's positive move.
News event dated 2026-10-12, CNBC Top News: Options traders bet heavily on 30% rally in Snap shares
Moved 4.8%, at or above the 3% floor for this strip
Same-day headline directly asks why Super Micro fell, matching the session's decline.
Headline dated 2026-10-12: Why Is Super Micro Computer Stock Falling on Monday? - Benzinga
Moved 4.5%, 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. Rows naming this company were read inside that window and none of them was resolved to this session's move.
Moved 3.9%, at or above the 3% floor for this strip
Same-day headline reporting Meta rallied Monday morning matches the session's gain.
Headline dated 2026-10-12: Why Meta Platforms Stock Rallied Monday Morning - Yahoo Finance
Moved 3.4%, 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. Rows naming this company were read inside that window and none of them was resolved to this session's move.
Moved 3.2%, 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 0.06% while the equal weight fund rose 0.07%, a 0.13 point gap that points to a split session rather than a uniform decline across constituents.
The Dow Jones rose 0.38% even as the Nasdaq Composite fell 0.44% and the Russell 2000 fell 0.45%, showing large-cap value diverging from growth and small caps.
Sector returns spanned Energy up 1.43% to Technology down 1.22%, a wide gap that shows rotation out of technology beneath a nearly flat headline index.
Participation held at 3 of 8 tracked indices above their 50-day average, unchanged from the prior session, indicating breadth has not improved despite the mixed index moves.
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.