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WFSPX vs. OC
Performance
Return for Risk
Drawdowns
Volatility
Dividends

WFSPX vs. OC

Last updated Jun 24, 2026

WFSPX (iShares S&P 500 Index Fund Class K) is S&P 500 fund tracking the S&P 500 Index, while OC (Owens Corning) is a stock. Over the past 10 years, WFSPX returned 15.68%/yr vs 11.23%/yr for OC. A 0.58 correlation means they provide meaningful diversification when combined.

Performance

WFSPX vs. OC - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares S&P 500 Index Fund Class K (WFSPX) and Owens Corning (OC). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, WFSPX achieves a 9.77% return, which is significantly lower than OC's 12.49% return. Over the past 10 years, WFSPX has outperformed OC with an annualized return of 15.68%, while OC has yielded a comparatively lower 11.23% annualized return.

WFSPX

1D
-0.36%
1M
0.10%
YTD
9.77%
6M
8.77%
1Y
25.45%
3Y*
21.35%
5Y*
13.57%
10Y*
15.68%

OC

1D
-0.40%
1M
5.71%
YTD
12.49%
6M
10.87%
1Y
-6.08%
3Y*
1.90%
5Y*
6.94%
10Y*
11.23%
*Multi-year figures are annualized to reflect compound growth (CAGR)

WFSPX vs. OC - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
WFSPX
iShares S&P 500 Index Fund Class K		9.77%17.83%24.94%26.25%-18.14%28.63%18.43%31.45%-4.83%21.27%
OC
Owens Corning		12.49%-33.02%16.61%77.17%-4.23%20.93%18.12%50.63%-51.68%80.33%

Correlation

The correlation between WFSPX and OC is 0.48, which is low. Their price movements are largely independent, making them effective diversification partners.

Correlation
Correlation (1Y)
Calculated over the trailing 1-year period

0.48

Correlation (3Y)
Calculated over the trailing 3-year period

0.57

Correlation (5Y)
Calculated over the trailing 5-year period

0.62

Correlation (10Y)
Calculated over the trailing 10-year period

0.58

Correlation (All Time)
Calculated using the full available price history since Nov 1, 2006

0.58

The correlation between WFSPX and OC shifts across timeframes, from 0.48 (1 year) to 0.62 (5 years), reflecting how their relationship changes across market environments.

Compare stocks, funds, or ETFs

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iShares S&P 500 Index Fund Class K

Owens Corning

Often compared with WFSPX:
WFSPX vs. JLGMXWFSPX vs. VOOWFSPX vs. FSPGXWFSPX vs. FXAIXWFSPX vs. BRMKXWFSPX vs. IVVWFSPX vs. APGYX
Often compared with OC:
OC vs. CRHOC vs. SPYOC vs. MASOC vs. SSDOC vs. ONTOOC vs. VOOOC vs. NVDA

Return for Risk

WFSPX vs. OC — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
WFSPX
WFSPX Risk / Return Rank: 6565
Overall Rank
WFSPX Sharpe Ratio Rank: 6363
Sharpe Ratio Rank
WFSPX Sortino Ratio Rank: 5757
Sortino Ratio Rank
WFSPX Omega Ratio Rank: 5959
Omega Ratio Rank
WFSPX Calmar Ratio Rank: 6767
Calmar Ratio Rank
WFSPX Martin Ratio Rank: 7878
Martin Ratio Rank
OC
OC Risk / Return Rank: 3535
Overall Rank
OC Sharpe Ratio Rank: 3636
Sharpe Ratio Rank
OC Sortino Ratio Rank: 3232
Sortino Ratio Rank
OC Omega Ratio Rank: 3232
Omega Ratio Rank
OC Calmar Ratio Rank: 3737
Calmar Ratio Rank
OC Martin Ratio Rank: 3737
Martin Ratio Rank
The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

WFSPX vs. OC - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares S&P 500 Index Fund Class K (WFSPX) and Owens Corning (OC). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

WFSPXOCDifference
Sharpe ratioReturn per unit of total volatility
2.15
-0.16

+2.31

Sortino ratioReturn per unit of downside risk
2.90
0.02

+2.88

Omega ratioGain probability vs. loss probability

1.39

1.00

+0.39

Calmar ratioReturn relative to maximum drawdown

3.01

-0.16

+3.17

Martin ratioReturn relative to average drawdown

13.58

-0.29

+13.87

WFSPX vs. OC - Sharpe Ratio Comparison

The current WFSPX Sharpe Ratio is 2.15, which is higher than the OC Sharpe Ratio of -0.16. The chart below compares the historical Sharpe Ratios of WFSPX and OC, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

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Drawdowns

WFSPX vs. OC - Drawdown Comparison

The maximum WFSPX drawdown since its inception was -58.21%, smaller than the maximum OC drawdown of -85.22%. Use the drawdown chart below to compare losses from any high point for WFSPX and OC.

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Drawdown Indicators

WFSPXOCDifference

Max Drawdown

Largest peak-to-trough decline

-58.21%

-85.22%

+27.01%

Max Drawdown (1Y)

Largest decline over 1 year

-8.90%

-37.33%

+28.43%

Max Drawdown (3Y)

Largest decline over 3 years

-18.74%

-52.48%

+33.74%

Max Drawdown (5Y)

Largest decline over 5 years

-24.51%

-52.48%

+27.97%

Max Drawdown (10Y)

Largest decline over 10 years

-33.74%

-66.57%

+32.83%

Current Drawdown

Current decline from peak

-1.72%

-39.13%

+37.41%

Average Drawdown

Average peak-to-trough decline

-12.76%

-20.68%

+7.92%

Ulcer Index

Depth and duration of drawdowns from previous peaks

1.97%

21.03%

-19.06%

Volatility

WFSPX vs. OC - Volatility Comparison

The current volatility for iShares S&P 500 Index Fund Class K (WFSPX) is 4.67%, while Owens Corning (OC) has a volatility of 12.78%. This indicates that WFSPX experiences smaller price fluctuations and is considered to be less risky than OC based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

WFSPXOCDifference

Volatility (1M)

Calculated over the trailing 1-month period

4.67%

12.78%

-8.11%

Volatility (6M)

Calculated over the trailing 6-month period

9.83%

27.96%

-18.13%

Volatility (1Y)

Calculated over the trailing 1-year period

12.49%

37.34%

-24.85%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

16.97%

34.78%

-17.81%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

18.07%

35.41%

-17.34%

Dividends

WFSPX vs. OC - Dividend Comparison

WFSPX's dividend yield for the trailing twelve months is around 1.59%, less than OC's 2.38% yield.

PositionTTM20252024202320222021202020192018201720162015
OC
Owens Corning		2.38%2.47%1.41%1.40%1.64%1.15%1.27%1.35%1.43%0.88%1.44%1.45%
WFSPX
iShares S&P 500 Index Fund Class K		1.59%1.72%1.41%1.50%2.02%1.82%1.66%1.99%2.00%1.62%2.37%2.49%

Frequently Asked Questions

WFSPX and OC have a correlation of 0.48, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

OC has higher volatility (12.78%) compared to WFSPX (4.67%). In terms of maximum drawdown, WFSPX dropped -58.21% vs OC's -85.22%.

WFSPX currently has the higher Sharpe Ratio (2.15 vs -0.16), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.

Portfolio Optimizer

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