The Day's Poster
The Tuesday, September 15 session at a glance: the Nasdaq 100's hundred companies drawn as one city skyline.
Broad Selloff: 75 Nasdaq 100 Stocks Fell; All Sectors Fell
Nasdaq 100− 0.65%
The Nasdaq 100 Skyline
- Building Width: Market Value
- Height: Daily Change
- Above the Horizon Rose, Below Fell
Each building is a Nasdaq 100 company; the buildings stand in sector districts, from the strongest district to the weakest. Tap a building or step through with the arrow keys.
Highlights
- Up and Down
- 2675
- Strongest Sector
- − 0.36%
- Technology
- Weakest Sector
- − 2.54%
- Industrials
- Other Indices
- S&P 500− 0.46%Dow Jones− 0.62%Russell 2000− 0.96%
The headline is built from these numbers by fixed rules: a broad day when at least 70% of the companies that moved went the same way, a narrow day when the index went one way and most companies the other; flat when the Nasdaq 100 closed within ±0.10%. The sector order comes from the districts' changes.
Changes are the Sep 15 close against the Sep 14 close; after-hours trading is not included.
A building's width is proportional to the square root of the company's market value at the Sep 15 close (using today's share count): the square root keeps the gap of several hundred times between the largest and smallest company readable.
The height scale runs to ±4.9%; buildings beyond it are cut at the top, with their real values in their labels and in the list.
Districts are GICS sectors; sectors with fewer than five companies are grouped as Other Sectors. A district's change is its companies' average weighted by market value.
The indices are tracked through their funds (QQQ, SPY, DIA, IWM); changes are fund price changes, excluding dividends.
Breadth is counted with today's Nasdaq 100 member list; on a past day a few companies not yet in the index may be counted and departed ones left out.
Alpaca · SIPUpdated October 26 14:00 NY15 Minutes Delayed
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