The market capitalization of small-cap stocks like Abercrombie & Fitch (ANF) has risen by billions of dollars this year, helped by a recent rotation from large-cap stocks (SP500)(SPY)(COMP:IND) into that part of the U.S. stock market.

Russell 2000 (RTY)) rose for a second straight week, gaining 1.5%, although the gain was restricted by a pause in the recent rally. Small-cap funds attracted $9.9 billion over the past week, the second-largest weekly inflow on record, Bank of America said Friday, citing EPFR data.

Insmed (INSM) is among the Russell 2000 (RTY) components seeing large jumps in share price performance as their market cap increases. Insmed (INSM) is valued at $11.3 billion this year, up from $4.3 billion in 2023. Shares of the biotech company focused on occasional lung diseases are up 145% YTD, from a ~29% loss in behind schedule May.

Here’s how the market capitalization of the 10 most valuable stocks in the iShares Russell 2000 ETF (IWM) has grown this year:

• Insmed (INSM) – Market Capitalization: $11.3 billion – Market capitalization in 2023: $4.3 billion
• FTAI Aviation (FTAI) – Market Capitalization: $10.3 billion – Market capitalization in 2023: $4.65 billion
• Vaxcyte (PCVX) – Market Capitalization: $8.66 billion – Market capitalization in 2023: $5.98 billion
• Fabrinet (FN) – Market capitalization: $8.58 billion – Market capitalization in 2023: $6.91 billion
• Sprouts (SFM) – Market Capitalization: $8.31 billion – Market capitalization in 2023: $4.89 billion
• Fluor (FLR) – Market Capitalization: $8.2 billion – Market capitalization in 2023: $4.89 billion
• Abercrombie & Fitch (ANF) – Market Capitalization: $8.02 billion – Market capitalization in 2023: $4.45 billion
• Lantheus (LNTH) – Market Capitalization: $8.02 billion – Market capitalization in 2023: $4.25 billion
• Applied Industrial Technologies (AIT) – Market Capitalization: $8.01 billion – Market capitalization in 2023: $4.25 billion
• Ensign Group (ENSG) – market capitalization: $7.7 billion – Market capitalization in 2023: $6.28 billion

Other small-cap ETFs include (IJR), (VB), (VBR), (SPSM), and (DFAS).