OC vs. WFSPX

Last updated Apr 1, 2026

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

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

OC vs. WFSPX - Performance Comparison

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

OC vs. WFSPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OC Owens Corning	-1.92%	-33.02%	16.61%	77.17%	-4.23%	20.93%	18.12%	50.63%	-51.68%	80.33%
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%

Returns By Period

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

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%

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%

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

Return for Risk

OC vs. WFSPX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

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

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

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.

OC vs. WFSPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Owens Corning (OC) and iShares S&P 500 Index Fund (WFSPX). 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.

	OC	WFSPX	Difference
Sharpe ratio Return per unit of total volatility	-0.58	0.84	-1.42
Sortino ratio Return per unit of downside risk	-0.68	1.30	-1.97
Omega ratio Gain probability vs. loss probability	0.92	1.20	-0.28
Calmar ratio Return relative to maximum drawdown	-0.60	1.06	-1.65
Martin ratio Return relative to average drawdown	-1.21	5.13	-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.

OC vs. WFSPX - Sharpe Ratio Comparison

The current OC Sharpe Ratio is -0.58, which is lower than the WFSPX Sharpe Ratio of 0.84. The chart below compares the historical Sharpe Ratios of OC and WFSPX, 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

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

Correlation

The correlation between OC and WFSPX 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

OC vs. WFSPX - Dividend Comparison

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

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
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%

Drawdowns

OC vs. WFSPX - Drawdown Comparison

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

Drawdown Indicators

	OC	WFSPX	Difference
Max Drawdown Largest peak-to-trough decline	-85.22%	-58.21%	-27.01%
Max Drawdown (1Y) Largest decline over 1 year	-37.33%	-12.11%	-25.22%
Max Drawdown (5Y) Largest decline over 5 years	-52.48%	-24.51%	-27.97%
Max Drawdown (10Y) Largest decline over 10 years	-66.57%	-33.74%	-32.83%
Current Drawdown Current decline from peak	-46.92%	-8.90%	-38.02%
Average Drawdown Average peak-to-trough decline	-20.44%	-12.84%	-7.60%
Ulcer Index Depth and duration of drawdowns from previous peaks	18.32%	2.49%	+15.83%

Volatility

OC vs. WFSPX - Volatility Comparison

Owens Corning (OC) has a higher volatility of 12.83% compared to iShares S&P 500 Index Fund (WFSPX) at 4.24%. This indicates that OC's price experiences larger fluctuations and is considered to be riskier than WFSPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

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