OGS vs. FXAIX
OGS (ONE Gas, Inc.) is a stock, while FXAIX (Fidelity 500 Index Fund) is S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, OGS returned 5.05%/yr vs 15.00%/yr for FXAIX. Their 0.30 correlation means their historical movements had little consistent relationship.
Performance
OGS vs. FXAIX - Performance Comparison
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Returns By Period
In the year-to-date period, OGS achieves a 2.17% return, which is significantly lower than FXAIX's 9.35% return. Over the past 10 years, OGS has underperformed FXAIX with an annualized return of 5.05%, while FXAIX has yielded a comparatively higher 15.00% annualized return.
OGS
- 1D
- -0.56%
- 1M
- 0.43%
- 6M
- -0.80%
- YTD
- 2.17%
- 1Y
- 10.72%
- 3Y*
- 3.60%
- 5Y*
- 4.62%
- 10Y*
- 5.05%
- ALL TIME*
- 10.20%
FXAIX
- 1D
- 1.66%
- 1M
- -0.56%
- 6M
- 7.79%
- YTD
- 9.35%
- 1Y
- 20.63%
- 3Y*
- 19.03%
- 5Y*
- 12.68%
- 10Y*
- 15.00%
- ALL TIME*
- 13.89%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $35.52M | $41.73M | $52.68M |
OGS vs. FXAIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
OGS ONE Gas, Inc. | 2.17% | 15.57% | 13.08% | -12.77% | 0.63% | 4.36% | -15.74% | 20.26% | 11.40% | 17.30% |
FXAIX Fidelity 500 Index Fund | 9.35% | 17.84% | 25.01% | 26.29% | -18.14% | 28.71% | 18.42% | 31.48% | -4.43% | 21.82% |
Correlation
The correlation between OGS and FXAIX is -0.11, meaning they have often moved in opposite directions in the past. This relationship can weaken or reverse as market conditions change.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | -0.11 |
Correlation (3Y) Balances recent behavior with more history. | 0.12 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.20 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.26 |
Correlation (All Time) Calculated using the full available price history since Jan 16, 2014 | 0.30 |
The correlation between OGS and FXAIX shifts across timeframes, from -0.11 (1 year) to 0.30 (all time), reflecting how their relationship changes across market environments.
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Return for Risk
OGS vs. FXAIX — Risk / Return Rank
OGS
FXAIX
OGS vs. FXAIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for ONE Gas, Inc. (OGS) and Fidelity 500 Index Fund (FXAIX). 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.
| OGS | FXAIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.84 | ||
| Sortino ratioReturn per unit of downside risk | -1.06 | ||
| Omega ratioGain probability vs. loss probability | 1.11 | 1.26 | -0.15 |
| Calmar ratioReturn relative to maximum drawdown | 0.66 | 2.06 | -1.40 |
| Martin ratioReturn relative to average drawdown | 1.57 | 8.86 | -7.29 |
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Drawdowns
OGS vs. FXAIX - Drawdown Comparison
The maximum OGS drawdown since its inception was -33.50%, roughly equal to the maximum FXAIX drawdown of -33.79%. Use the drawdown chart below to compare losses from any high point for OGS and FXAIX.
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Drawdown Indicators
| OGS | FXAIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -33.50% | -33.79% | +0.29% |
Max Drawdown (1Y)Largest decline over 1 year | -15.84% | -8.89% | -6.95% |
Max Drawdown (3Y)Largest decline over 3 years | -24.68% | -18.76% | -5.92% |
Max Drawdown (5Y)Largest decline over 5 years | -33.50% | -24.50% | -9.00% |
Max Drawdown (10Y)Largest decline over 10 years | -33.50% | -33.79% | +0.29% |
Current DrawdownCurrent decline from peak | -13.62% | -2.11% | -11.51% |
Average DrawdownAverage peak-to-trough decline | -9.68% | -3.77% | -5.91% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 6.66% | 2.07% | +4.59% |
Volatility
OGS vs. FXAIX - Volatility Comparison
ONE Gas, Inc. (OGS) has a higher volatility of 6.55% compared to Fidelity 500 Index Fund (FXAIX) at 3.44%. This indicates that OGS's price experiences larger fluctuations and is considered to be riskier than FXAIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| OGS | FXAIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.55% | 3.44% | +3.11% |
Volatility (6M)Calculated over the trailing 6-month period | 13.86% | 10.09% | +3.77% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.88% | 12.86% | +5.02% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 23.59% | 17.03% | +6.56% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 25.96% | 18.07% | +7.89% |
Dividends
OGS vs. FXAIX - Dividend Comparison
OGS's dividend yield for the trailing twelve months is around 3.48%, more than FXAIX's 1.07% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FXAIX Fidelity 500 Index Fund | 1.07% | 1.11% | 1.25% | 1.45% | 1.69% | 1.22% | 1.60% | 2.06% | 2.72% | 1.97% | 2.52% | 2.83% |
OGS ONE Gas, Inc. | 3.48% | 3.47% | 3.81% | 4.08% | 3.28% | 2.99% | 2.81% | 2.14% | 2.31% | 2.29% | 2.19% | 2.39% |
Frequently Asked Questions
OGS and FXAIX have a correlation of -0.11, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
OGS has higher volatility (6.55%) compared to FXAIX (3.44%). In terms of maximum drawdown, OGS dropped -33.50% vs FXAIX's -33.79%.
FXAIX currently has the higher Sharpe Ratio (1.43 vs 0.59), 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.
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