Published Oct 13, 2026, 4:35 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.
J&J shares fell despite strong overall earnings as investors focused on weak medtech unit sales.
Headline dated 2026-10-13: Johnson & Johnson stock falls despite strong earnings as investors focus on medtech unit - Yahoo Finance
Moved 5.7%, at or above the 3% floor for this strip
IonQ's $1.3 billion all-stock acquisition of cybersecurity firm Elisity may have weighed on shares.
News event dated 2026-10-12, CNBC Top News: IonQ acquires cybersecurity firm Elisity in $1.3 billion all-stock deal
Moved 4.2%, 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 3.9%, 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 3.3%, 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 0.02% while the equal weight fund rose 0.05%, a 0.07 point gap suggesting a mixed session rather than a broad decline.
Comparison indices diverged, with the Dow down 0.35% and the Russell 2000 down 0.40% both underperforming the nearly flat headline index.
Sector returns ranged from Energy up 1.80% to Health Care down 1.35%, a wide spread beneath a headline index that barely moved.
Participation held at 3 of 8 tracked indices above their 50-day average, unchanged from the prior session, indicating breadth has not improved.
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.