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ETF Comparisons

SPY vs. IWM

SPDR S&P 500 ETF Trust

SPY
$—
Today’s Change
— (—)
vs

iShares Russell 2000 ETF

IWM
$—
Today’s Change
— (—)

Correlation

Compare with

Top 10 comparisons with SPY:
Compare:
SPY
Correlation
With:
IWM
iShares Russell 2000 ETF
SwitchSSOProShares Trust - ProShares Ultra S&P500 2x Shares1.00IVVBlackRock Institutional Trust Company N.A. - iShares Core S&P 500 ETF1.00SPXLDirexion Shares ETF Trust - Direxion Daily S&P 500 Bull 3X Shares1.00VOOVanguard Group, Inc. - Vanguard S&P 500 ETF1.00UPROProShares Trust - ProShares UltraPro S&P 500 ETF 3x Shares1.00SPLGSPDR Series Trust - SPDR Portfolio S&P 500 ETF1.00VVVanguard Group, Inc. - Vanguard Large Cap ETF1.00SCHXSchwab Strategic Trust - Schwab U.S. Large-Cap ETF1.00ESGUiShares Trust - iShares Trust iShares ESG Aware MSCI USA ETF1.00IWBBlackRock Institutional Trust Company N.A. - iShares Russell 1000 ETF1.00

Top 10 shared holdings

The top 10 holdings shared by SPY and IWM:

There are no shared holdings.
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1M
3M
6M
YTD
1Y
3Y
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Performance Measures**

for the time period Jan 29, 1993 to Dec 16, 2025

Returns

1M Trailing Return:

3M Trailing Return:

SPY

2.0%

3.1%

IWM

7.7%

5.2%

Diff.

-5.7%

-2.1%

Measures of Risk or Volatility

Max Drawdown:

Standard Deviation:

SPY

-55.2%

18.7%

IWM

-59.1%

24.0%

Diff.

+3.9%

-5.3%

Measures of Risk-Adjusted Performance

Sharpe Ratio:

Calmar Ratio:

SPY

0.64

0.19

IWM

0.45

0.14

Diff.

+0.19

+0.05

SPYSPDR S&P 500 ETF Trust
IWMiShares Russell 2000 ETF

What is SPY?

The SPDR S&P 500 ETF is a fund that before expenses generally corresponds to the price and yield performance of the S&P 500 Index.

Snapshot
**

SPY SPDR S&P 500 ETF Trust
IWM iShares Russell 2000 ETF
Inception date
Jan 22, 1993
May 22, 2000
Expense ratio
0.09%
0.19%
SPY has a lower expense ratio than IWM by 0.1%. This can indicate that it’s cheaper to invest in SPY than IWM.
Type
US Equities
US Equities
SPY targets investing in US Equities, while IWM targets investing in US Equities.
Fund owner
State Street (SPDR)
Blackrock (iShares)
SPY is managed by State Street (SPDR), while IWM is managed by Blackrock (iShares).
Volume (1m avg. daily)
$33,257,618,740
$4,463,198,665
Both SPY and IWM are considered high-volume assets. They’re less likely to be affected by issues like slippage and failed orders on Composer than low-volume assets.
AUM
$400,404,126,565
$50,549,436,527
SPY has more assets under management than IWM by $349,854,690,038. Higher AUM can be associated with better liquidity and lower slippage in trading.
Associated index
S&P 500 Index
Russell 2000 Index
SPY is based off of the S&P 500 Index, while IWM is based off of the Russell 2000 Index
Inverse/Leveraged
No
No
Neither SPY nor IWM use an inverse or leveraged strategy.
Passive/Active
Passive
Passive
SPY and IWM both use a Passive investing strategy. In an actively managed fund, the fund manager makes decisions about how funds are invested. A passively managed fund typically tries to track or follow a market index.
Dividend
No
No
SPY and IWM may offer dividends. The frequency and yield of the dividend may not be the same.
Prospectus
View
View
SPY may issue a K1, while IWM does not. You can find non-K1 alternatives for SPY in its “Related ETFs” section.

Trading Strategies
Related toSPY

Inside Nancy Pelosi's Chips- V3

Category

Semiconductors, mean reversion, momentum, trend filter, RSI, leveraged ETFs, tactical, energy, commodities

OOS Cumulative Return

1621.64%

Trading Strategies
Related toIWM

Modified Foreign Rat

Category

Tactical asset allocation, volatility regime, leveraged ETFs, mean reversion, trend following, emerging markets, hedged/cash, daily rebalance

OOS Cumulative Return

574.54%

Create your own algorithmic
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Disclaimers

*

We show information directly obtained from our data provider, Xignite. Data shown here is provided by Xignite, an unaffiliated third party. Composer believes the information shown here is reliable, but has not been verified and there is no guarantee that the information is accurate.

**

We show information based on calculations performed by Composer using data from our provider. Information provided here is based on calculations performed by Composer using data sourced from Xignite, an unaffiliated third party. Composer believes this information is reliable, but has not verified the data and there is no guarantee that the calculations are accurate.