DIOD vs. SPY

Last updated Jun 4, 2026

DIOD (Diodes Incorporated) 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, DIOD returned 19.48%/yr vs 15.49%/yr for SPY. At a 0.43 correlation, their price movements are largely independent.

Performance

DIOD vs. SPY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Diodes Incorporated (DIOD) 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, DIOD achieves a 135.55% return, which is significantly higher than SPY's 10.91% return. Over the past 10 years, DIOD has outperformed SPY with an annualized return of 19.48%, while SPY has yielded a comparatively lower 15.49% annualized return.

DIOD

• 1D: 1.83%
• 1M: 6.92%
• YTD: 135.55%
• 6M: 126.42%
• 1Y: 149.40%
• 3Y*: 8.49%
• 5Y*: 8.66%
• 10Y*: 19.48%

SPY

• 1D: -0.70%
• 1M: 5.05%
• YTD: 10.91%
• 6M: 10.91%
• 1Y: 27.98%
• 3Y*: 22.35%
• 5Y*: 13.83%
• 10Y*: 15.49%

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

DIOD vs. SPY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
DIOD Diodes Incorporated	135.55%	-19.99%	-23.41%	5.75%	-30.66%	55.76%	25.07%	74.74%	12.52%	11.69%
SPY State Street SPDR S&P 500 ETF	10.91%	17.72%	24.89%	26.18%	-18.18%	28.73%	18.33%	31.22%	-4.57%	21.71%

Correlation

The correlation between DIOD and SPY is 0.54, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.54
Correlation (3Y) Calculated over the trailing 3-year period	0.55
Correlation (5Y) Calculated over the trailing 5-year period	0.64
Correlation (10Y) Calculated over the trailing 10-year period	0.61
Correlation (All Time) Calculated using the full available price history since Feb 1, 1993	0.43

The correlation between DIOD and SPY shifts across timeframes, from 0.43 (all time) to 0.64 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

DIOD vs. SPY — Risk / Return Rank

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

DIOD

DIOD Risk / Return Rank: 91
DIOD Sharpe Ratio Rank: 93
DIOD Sortino Ratio Rank: 91
DIOD Omega Ratio Rank: 90
DIOD Calmar Ratio Rank: 92
DIOD Martin Ratio Rank: 92

SPY

SPY Risk / Return Rank: 70
SPY Sharpe Ratio Rank: 71
SPY Sortino Ratio Rank: 69
SPY Omega Ratio Rank: 70
SPY Calmar Ratio Rank: 62
SPY Martin Ratio Rank: 75

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.

DIOD vs. SPY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Diodes Incorporated (DIOD) 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.

	DIOD	SPY	Difference
Sharpe ratio: Return per unit of total volatility	2.68	2.38	+0.30
Sortino ratio: Return per unit of downside risk	3.34	3.24	+0.10
Omega ratio: Gain probability vs. loss probability	1.43	1.43	0.00
Calmar ratio: Return relative to maximum drawdown	5.48	3.16	+2.31
Martin ratio: Return relative to average drawdown	14.09	14.72	-0.63
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

DIOD vs. SPY - Sharpe Ratio Comparison

The current DIOD Sharpe Ratio is 2.68, which is comparable to the SPY Sharpe Ratio of 2.38. The chart below compares the historical Sharpe Ratios of DIOD 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.

Sharpe Ratios by Period

	DIOD	SPY	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.68	2.38	+0.30
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.19	0.82	-0.63
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.45	0.87	-0.41
Sharpe Ratio (All Time) Calculated using the full available price history	0.32	0.59	-0.26

Drawdowns

DIOD vs. SPY - Drawdown Comparison

The maximum DIOD drawdown since its inception was -90.09%, which is greater than SPY's maximum drawdown of -55.19%. Use the drawdown chart below to compare losses from any high point for DIOD and SPY.

Drawdown Indicators

	DIOD	SPY	Difference
Max Drawdown Largest peak-to-trough decline	-90.09%	-55.19%	-34.90%
Max Drawdown (1Y) Largest decline over 1 year	-27.44%	-8.88%	-18.56%
Max Drawdown (3Y) Largest decline over 3 years	-64.19%	-18.76%	-45.43%
Max Drawdown (5Y) Largest decline over 5 years	-69.52%	-24.50%	-45.02%
Max Drawdown (10Y) Largest decline over 10 years	-69.52%	-33.72%	-35.80%
Current Drawdown Current decline from peak	0.00%	-0.70%	+0.70%
Average Drawdown Average peak-to-trough decline	-33.34%	-9.05%	-24.29%
Ulcer Index Depth and duration of drawdowns from previous peaks	10.65%	1.91%	+8.74%

Volatility

DIOD vs. SPY - Volatility Comparison

Diodes Incorporated (DIOD) has a higher volatility of 20.33% compared to State Street SPDR S&P 500 ETF (SPY) at 2.84%. This indicates that DIOD's price experiences larger fluctuations and is considered to be riskier than SPY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	DIOD	SPY	Difference
Volatility (1M) Calculated over the trailing 1-month period	20.33%	2.84%	+17.49%
Volatility (6M) Calculated over the trailing 6-month period	43.59%	8.90%	+34.69%
Volatility (1Y) Calculated over the trailing 1-year period	56.29%	11.83%	+44.46%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	46.48%	17.05%	+29.43%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	43.25%	17.94%	+25.31%

Dividends

DIOD vs. SPY - Dividend Comparison

DIOD has not paid dividends to shareholders, while SPY's dividend yield for the trailing twelve months is around 0.98%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DIOD Diodes Incorporated	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SPY State Street SPDR S&P 500 ETF	0.98%	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 DIOD and SPY in my portfolio?

DIOD and SPY have a correlation of 0.54, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, DIOD or SPY?

DIOD has higher volatility (20.33%) compared to SPY (2.84%). In terms of maximum drawdown, DIOD dropped -90.09% vs SPY's -55.19%.

Which has better risk-adjusted returns?

DIOD currently has the higher Sharpe Ratio (2.68 vs 2.38), 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.