Russell 1000 Index

{{Short description|Stock index}}

{{Infobox index

| name = Russell 1000 Index

| logo =

| image =

| caption =

| foundation = {{Start date and age|1984|01|01}}

| operator = FTSE Russell

| exchanges = {{ubl|NYSE|Nasdaq|Cboe BZX Exchange}}

| constituents = {{approx.|1,000}}

| cap_level = Large cap

| mcap =

| weighting = Free-float capitalization-weighted

| related = Russell 3000 Index

| symbol = {{UBL |RUI |.RUI |^RUI }}

| homepage = {{URL|ftse.com/products/indices/russell-us}}

| reuters =

| bloomberg = RIY:IND

}}

The Russell 1000 Index is a U.S. stock market index that tracks the highest-ranking 1,000 stocks in the Russell 3000 Index, which represent about 93% of the total market capitalization of that index.

{{as of|2024|12|31}}, the stocks of the Russell 1000 Index had a weighted average market capitalization of $1.013 trillion and a median market capitalization of $15.7 billion. {{as of|2020|05|08}}, components ranged in market capitalization from $1.8 billion to $1.4 trillion.{{cite web | url=https://www.ftserussell.com/research-insights/russell-reconstitution/market-capitalization-ranges | title=Market capitalization Ranges | publisher=FTSE Russell}}

The index, which was launched on January 1, 1984, is maintained by FTSE Russell, a subsidiary of the United Kingdom-based London Stock Exchange Group. The ticker symbol is typically RUI, .RUI or ^RUI. There are several exchange-traded funds and mutual funds that track the index.