WFSPX vs. OC

Last updated Apr 1, 2026

Compare and contrast key facts about iShares S&P 500 Index Fund (WFSPX) and Owens Corning (OC).

WFSPX is a passively managed fund by BlackRock that tracks the performance of the S&P 500 Index. It was launched on Jul 30, 1993.

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 (WFSPX) and Owens Corning (OC). The values are adjusted to include any dividend payments, if applicable.

WFSPX vs. OC - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WFSPX iShares S&P 500 Index Fund	-7.06%	17.83%	24.94%	26.25%	-18.14%	28.63%	18.43%	31.45%	-4.83%	21.27%
OC Owens Corning	-1.92%	-33.02%	16.61%	77.17%	-4.23%	20.93%	18.12%	50.63%	-51.68%	80.33%

Returns By Period

In the year-to-date period, WFSPX achieves a -7.06% return, which is significantly lower than OC's -1.92% return. Over the past 10 years, WFSPX has outperformed OC with an annualized return of 13.63%, while OC has yielded a comparatively lower 10.29% annualized return.

WFSPX

• 1D: -0.39%
• 1M: -7.68%
• YTD: -7.06%
• 6M: -4.63%
• 1Y: 14.40%
• 3Y*: 17.13%
• 5Y*: 11.37%
• 10Y*: 13.63%

OC

• 1D: 3.74%
• 1M: -10.70%
• YTD: -1.92%
• 6M: -21.98%
• 1Y: -22.34%
• 3Y*: 6.11%
• 5Y*: 4.75%
• 10Y*: 10.29%

*Multi-year figures are annualized to reflect compound growth (CAGR)

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: 46
WFSPX Sharpe Ratio Rank: 41
WFSPX Sortino Ratio Rank: 45
WFSPX Omega Ratio Rank: 50
WFSPX Calmar Ratio Rank: 41
WFSPX Martin Ratio Rank: 53

OC

OC Risk / Return Rank: 18
OC Sharpe Ratio Rank: 16
OC Sortino Ratio Rank: 17
OC Omega Ratio Rank: 18
OC Calmar Ratio Rank: 22
OC Martin Ratio Rank: 19

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 (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.

	WFSPX	OC	Difference
Sharpe ratio Return per unit of total volatility	0.84	-0.58	+1.42
Sortino ratio Return per unit of downside risk	1.30	-0.68	+1.97
Omega ratio Gain probability vs. loss probability	1.20	0.92	+0.28
Calmar ratio Return relative to maximum drawdown	1.06	-0.60	+1.65
Martin ratio Return relative to average drawdown	5.13	-1.21	+6.34
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WFSPX vs. OC - Sharpe Ratio Comparison

The current WFSPX Sharpe Ratio is 0.84, which is higher than the OC Sharpe Ratio of -0.58. The chart below compares the historical Sharpe Ratios of WFSPX and OC, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	WFSPX	OC	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.84	-0.58	+1.42
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.68	0.14	+0.54
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.76	0.30	+0.46
Sharpe Ratio (All Time) Calculated using the full available price history	0.13	0.21	-0.08

Correlation

The correlation between WFSPX and OC is 0.58, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.

Dividends

WFSPX vs. OC - Dividend Comparison

WFSPX's dividend yield for the trailing twelve months is around 1.58%, less than OC's 2.74% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
WFSPX iShares S&P 500 Index Fund	1.58%	1.72%	1.41%	1.50%	2.02%	1.82%	1.66%	1.99%	2.00%	1.62%	2.37%	2.49%
OC Owens Corning	2.74%	2.47%	1.41%	1.40%	1.64%	1.15%	1.27%	1.35%	1.43%	0.88%	1.44%	1.45%

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.

Drawdown Indicators

	WFSPX	OC	Difference
Max Drawdown Largest peak-to-trough decline	-58.21%	-85.22%	+27.01%
Max Drawdown (1Y) Largest decline over 1 year	-12.11%	-37.33%	+25.22%
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	-8.90%	-46.92%	+38.02%
Average Drawdown Average peak-to-trough decline	-12.84%	-20.44%	+7.60%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.49%	18.32%	-15.83%

Volatility

WFSPX vs. OC - Volatility Comparison

The current volatility for iShares S&P 500 Index Fund (WFSPX) is 4.24%, while Owens Corning (OC) has a volatility of 12.83%. 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.

Volatility by Period

	WFSPX	OC	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.24%	12.83%	-8.59%
Volatility (6M) Calculated over the trailing 6-month period	9.08%	25.76%	-16.68%
Volatility (1Y) Calculated over the trailing 1-year period	18.06%	38.35%	-20.29%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.84%	34.15%	-17.31%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.98%	34.97%	-16.99%