Direct Answer
US equity indexes divide the market by company size and listing venue. The best known measure large caps, but the family extends down through mid and small caps and out to total-market benchmarks that aim to cover the investable universe in one number.
Every us stock market indexes in this group
Size segments overlap less than their names suggest. Reading two US indexes as interchangeable because both say "large cap" is the most common mistake in this group.
- S&P 500: Large-cap U.S. equities (S&P Dow Jones Indices).
- Dow Jones Industrial Average: 30 U.S. blue-chip companies; price weighted (S&P Dow Jones Indices).
- Nasdaq Composite: Nasdaq-listed common-type stocks (Nasdaq).
- Nasdaq-100: 100 largest non-financial Nasdaq-listed companies (Nasdaq).
- Russell 2000: U.S. small-cap segment (FTSE Russell).
- Russell 1000: U.S. large-cap segment (FTSE Russell).
- Russell 3000: Broad investable U.S. equity market (FTSE Russell).
- S&P MidCap 400: U.S. mid-cap equities (S&P Dow Jones Indices).
- S&P SmallCap 600: U.S. small-cap equities (S&P Dow Jones Indices).
- S&P Composite 1500: Combined S&P 500/400/600 (S&P Dow Jones Indices).
- S&P Total Market Index: Broad U.S. equities (S&P Dow Jones Indices).
- Dow Jones U.S. Total Stock Market Index: Broad U.S. equities (S&P Dow Jones Indices).
- Nasdaq Next Generation 100: Next 100 largest non-financial Nasdaq companies outside NDX (Nasdaq).
- Nasdaq Financial-100: Large Nasdaq-listed financial companies (Nasdaq).
- PHLX Semiconductor Sector Index: Semiconductor industry benchmark (Nasdaq).
- Nasdaq Biotechnology Index: Nasdaq-listed biotechnology/pharma benchmark (Nasdaq).
Frequently Asked Questions
How many us stock market indexes does Swoopr cover?
Swoopr covers 16 indexes in this group, each with its own page explaining what it measures and how it is built.
Are index constituent lists published here?
No. Index providers license constituent data and Swoopr holds no such licence, so each index page links to the provider for current membership.
Does a higher index level mean a better market?
No. Index levels are not comparable across indexes. A level is the output of one index's own formula and base value, so comparing two levels directly measures nothing.