MPLX vs. SPY

Last updated Jun 20, 2026

MPLX (MPLX LP) is a stock, while SPY (State Street SPDR S&P 500 ETF) is S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, MPLX returned 15.31%/yr vs 15.48%/yr for SPY. At a 0.33 correlation, their price movements are largely independent.

Performance

MPLX vs. SPY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MPLX LP (MPLX) and State Street SPDR S&P 500 ETF (SPY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MPLX achieves a 10.71% return, which is significantly higher than SPY's 10.09% return. Both investments have delivered pretty close results over the past 10 years, with MPLX having a 15.31% annualized return and SPY not far ahead at 15.48%.

MPLX

• 1D: 1.66%
• 1M: 0.66%
• YTD: 10.71%
• 6M: 10.03%
• 1Y: 19.67%
• 3Y*: 28.75%
• 5Y*: 24.50%
• 10Y*: 15.31%

SPY

• 1D: 1.04%
• 1M: 0.41%
• YTD: 10.09%
• 6M: 10.30%
• 1Y: 27.05%
• 3Y*: 20.82%
• 5Y*: 14.00%
• 10Y*: 15.48%

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

MPLX vs. SPY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MPLX MPLX LP	10.71%	20.54%	41.72%	22.46%	21.09%	53.92%	-1.79%	-8.25%	-8.43%	9.00%
SPY State Street SPDR S&P 500 ETF	10.09%	17.72%	24.89%	26.18%	-18.18%	28.73%	18.33%	31.22%	-4.57%	21.71%

Correlation

The correlation between MPLX and SPY is 0.04, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.04
Correlation (3Y) Calculated over the trailing 3-year period	0.23
Correlation (5Y) Calculated over the trailing 5-year period	0.34
Correlation (10Y) Calculated over the trailing 10-year period	0.37
Correlation (All Time) Calculated using the full available price history since Oct 26, 2012	0.33

Over the past year, the correlation between MPLX and SPY has dropped to 0.04 - well below their long-term average of 0.33, suggesting their price drivers have been diverging.

Return for Risk

MPLX vs. SPY — Risk / Return Rank

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

MPLX

MPLX Risk / Return Rank: 76
MPLX Sharpe Ratio Rank: 78
MPLX Sortino Ratio Rank: 72
MPLX Omega Ratio Rank: 70
MPLX Calmar Ratio Rank: 80
MPLX Martin Ratio Rank: 79

SPY

SPY Risk / Return Rank: 70
SPY Sharpe Ratio Rank: 71
SPY Sortino Ratio Rank: 68
SPY Omega Ratio Rank: 70
SPY Calmar Ratio Rank: 64
SPY Martin Ratio Rank: 76

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.

MPLX vs. SPY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MPLX LP (MPLX) and State Street SPDR S&P 500 ETF (SPY). 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.

	MPLX	SPY	Difference
Sharpe ratio: Return per unit of total volatility	1.25	2.17	-0.92
Sortino ratio: Return per unit of downside risk	1.77	2.92	-1.15
Omega ratio: Gain probability vs. loss probability	1.21	1.39	-0.18
Calmar ratio: Return relative to maximum drawdown	2.55	3.02	-0.47
Martin ratio: Return relative to average drawdown	5.92	13.61	-7.69

MPLX vs. SPY - Sharpe Ratio Comparison

The current MPLX Sharpe Ratio is 1.25, which is lower than the SPY Sharpe Ratio of 2.17. The chart below compares the historical Sharpe Ratios of MPLX and SPY, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

MPLX vs. SPY - Drawdown Comparison

The maximum MPLX drawdown since its inception was -85.72%, which is greater than SPY's maximum drawdown of -55.19%. Use the drawdown chart below to compare losses from any high point for MPLX and SPY.

Drawdown Indicators

	MPLX	SPY	Difference
Max Drawdown Largest peak-to-trough decline	-85.72%	-55.19%	-30.53%
Max Drawdown (1Y) Largest decline over 1 year	-7.71%	-8.88%	+1.17%
Max Drawdown (3Y) Largest decline over 3 years	-14.58%	-18.76%	+4.18%
Max Drawdown (5Y) Largest decline over 5 years	-18.46%	-24.50%	+6.04%
Max Drawdown (10Y) Largest decline over 10 years	-75.21%	-33.72%	-41.49%
Current Drawdown Current decline from peak	-2.06%	-1.44%	-0.62%
Average Drawdown Average peak-to-trough decline	-29.91%	-9.04%	-20.87%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.32%	1.97%	+1.35%

Volatility

MPLX vs. SPY - Volatility Comparison

MPLX LP (MPLX) and State Street SPDR S&P 500 ETF (SPY) have volatilities of 4.72% and 4.73%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MPLX	SPY	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.72%	4.73%	-0.01%
Volatility (6M) Calculated over the trailing 6-month period	11.52%	9.81%	+1.71%
Volatility (1Y) Calculated over the trailing 1-year period	15.77%	12.41%	+3.36%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.37%	17.15%	+2.22%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	30.63%	17.98%	+12.65%

Dividends

MPLX vs. SPY - Dividend Comparison

MPLX's dividend yield for the trailing twelve months is around 7.36%, more than SPY's 1.24% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MPLX MPLX LP	7.36%	7.39%	7.33%	8.65%	8.80%	11.30%	12.70%	10.41%	8.22%	6.23%	5.86%	4.33%
SPY State Street SPDR S&P 500 ETF	1.01%	1.07%	1.21%	1.40%	1.65%	1.20%	1.52%	1.75%	2.04%	1.80%	2.03%	2.06%

Frequently Asked Questions

Can I hold both MPLX and SPY in my portfolio?

MPLX and SPY have a correlation of 0.04, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MPLX or SPY?

SPY has higher volatility (4.73%) compared to MPLX (4.72%). In terms of maximum drawdown, MPLX dropped -85.72% vs SPY's -55.19%.

Which has better risk-adjusted returns?

SPY currently has the higher Sharpe Ratio (2.17 vs 1.25), 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.