Russell 2500 Index

The Russell 2500 Index measures the performance of the 2,500 smallest companies (19% of total capitalization) in the Russell 3000 Index, with a weighted average market capitalization of approximately $4.3 billion, median capitalization of $1.2 billion and market capitalization of the largest company of $18.7 billion.

The index, which was launched on June 1, 1990, is maintained by FTSE Russell, a subsidiary of the London Stock Exchange Group. Its ticker symbol is ^R25I.

Top 10 holdings
(as of December 31, 2016)
 * Huntington Bancshares (nasdaq: HBAN)
 * Hologic (nasdaq: HOLX)
 * Mid-America Apartments (nyse: MAA)
 * Quintiles IMS Holdings (nyse: Q)
 * Alaska Air Group (nyse: ALK)
 * Idexx Laboratories (nasdaq: IDXX)
 * Snap-on (nyse: SNA)
 * Arch Capital Group (nasdaq: ACGL)
 * Lear Corporation (nyse: LEA)
 * E-Trade Financial (nasdaq: ETFC)

Top sectors by weight

 * Financial Services
 * Producer Durables
 * Consumer Discretionary
 * Technology
 * Health Care