AOSL vs. COST

Last updated Jun 3, 2026

AOSL (Alpha and Omega Semiconductor Limited) and COST (Costco Wholesale Corporation) are both stocks. AOSL operates in Semiconductors (Technology), while COST operates in Discount Stores (Consumer Defensive). Over the past 10 years, AOSL returned 14.49%/yr vs 22.25%/yr for COST. At a 0.23 correlation, their price movements are largely independent.

Performance

AOSL vs. COST - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Alpha and Omega Semiconductor Limited (AOSL) and Costco Wholesale Corporation (COST). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AOSL achieves a 169.16% return, which is significantly higher than COST's 10.97% return. Over the past 10 years, AOSL has underperformed COST with an annualized return of 14.49%, while COST has yielded a comparatively higher 22.25% annualized return.

AOSL

• 1D: 21.51%
• 1M: 23.77%
• YTD: 169.16%
• 6M: 158.21%
• 1Y: 149.74%
• 3Y*: 22.99%
• 5Y*: 11.89%
• 10Y*: 14.49%

COST

• 1D: 0.86%
• 1M: -5.68%
• YTD: 10.97%
• 6M: 3.79%
• 1Y: -9.20%
• 3Y*: 24.67%
• 5Y*: 21.28%
• 10Y*: 22.25%

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

AOSL vs. COST - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AOSL Alpha and Omega Semiconductor Limited	169.16%	-46.50%	42.10%	-8.79%	-52.82%	156.18%	73.57%	33.66%	-37.71%	-23.08%
COST Costco Wholesale Corporation	10.97%	-5.39%	39.62%	49.00%	-19.05%	51.82%	32.67%	45.70%	10.60%	22.37%

Correlation

The correlation between AOSL and COST 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	0.12
Correlation (5Y) Calculated over the trailing 5-year period	0.25
Correlation (10Y) Calculated over the trailing 10-year period	0.23
Correlation (All Time) Calculated using the full available price history since Apr 30, 2010	0.23

The correlation between AOSL and COST shifts across timeframes, from -0.04 (1 year) to 0.25 (5 years), reflecting how their relationship changes across market environments.

Fundamentals

EPS AOSL : -$2.58 COST : $26.51
PS Ratio AOSL : 2.33 COST : 1.08
Total Revenue (TTM) AOSL : $685.04M COST : $293.59B
Gross Profit (TTM) AOSL : $153.49M COST : $11.12B
EBITDA (TTM) AOSL : -$23.38M COST : $12.48B

Return for Risk

AOSL vs. COST — Risk / Return Rank

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

AOSL

AOSL Risk / Return Rank: 83
AOSL Sharpe Ratio Rank: 87
AOSL Sortino Ratio Rank: 81
AOSL Omega Ratio Rank: 85
AOSL Calmar Ratio Rank: 84
AOSL Martin Ratio Rank: 80

COST

COST Risk / Return Rank: 22
COST Sharpe Ratio Rank: 19
COST Sortino Ratio Rank: 18
COST Omega Ratio Rank: 19
COST Calmar Ratio Rank: 27
COST Martin Ratio Rank: 25

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.

AOSL vs. COST - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Alpha and Omega Semiconductor Limited (AOSL) and Costco Wholesale Corporation (COST). 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.

	AOSL	COST	Difference
Sharpe ratio Return per unit of total volatility	1.99	-0.48	+2.48
Sortino ratio Return per unit of downside risk	2.43	-0.56	+2.99
Omega ratio Gain probability vs. loss probability	1.36	0.93	+0.43
Calmar ratio Return relative to maximum drawdown	3.34	-0.40	+3.74
Martin ratio Return relative to average drawdown	6.63	-0.78	+7.41
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AOSL vs. COST - Sharpe Ratio Comparison

The current AOSL Sharpe Ratio is 1.99, which is higher than the COST Sharpe Ratio of -0.48. The chart below compares the historical Sharpe Ratios of AOSL and COST, 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

	AOSL	COST	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.99	-0.48	+2.48
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.17	0.94	-0.77
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.23	1.02	-0.79
Sharpe Ratio (All Time) Calculated using the full available price history	0.13	0.58	-0.46

Drawdowns

AOSL vs. COST - Drawdown Comparison

The maximum AOSL drawdown since its inception was -75.27%, which is greater than COST's maximum drawdown of -53.39%. Use the drawdown chart below to compare losses from any high point for AOSL and COST.

Drawdown Indicators

	AOSL	COST	Difference
Max Drawdown Largest peak-to-trough decline	-75.27%	-53.39%	-21.88%
Max Drawdown (1Y) Largest decline over 1 year	-45.32%	-19.25%	-26.07%
Max Drawdown (3Y) Largest decline over 3 years	-66.94%	-20.74%	-46.20%
Max Drawdown (5Y) Largest decline over 5 years	-75.27%	-31.40%	-43.87%
Max Drawdown (10Y) Largest decline over 10 years	-75.27%	-31.40%	-43.87%
Current Drawdown Current decline from peak	-18.87%	-12.80%	-6.07%
Average Drawdown Average peak-to-trough decline	-43.25%	-13.36%	-29.89%
Ulcer Index Depth and duration of drawdowns from previous peaks	22.82%	9.92%	+12.90%

Volatility

AOSL vs. COST - Volatility Comparison

Alpha and Omega Semiconductor Limited (AOSL) has a higher volatility of 43.20% compared to Costco Wholesale Corporation (COST) at 7.99%. This indicates that AOSL's price experiences larger fluctuations and is considered to be riskier than COST based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AOSL	COST	Difference
Volatility (1M) Calculated over the trailing 1-month period	43.20%	7.99%	+35.21%
Volatility (6M) Calculated over the trailing 6-month period	57.25%	14.81%	+42.44%
Volatility (1Y) Calculated over the trailing 1-year period	75.61%	19.17%	+56.44%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	69.71%	22.73%	+46.98%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	63.41%	21.95%	+41.46%

Dividends

AOSL vs. COST - Dividend Comparison

AOSL has not paid dividends to shareholders, while COST's dividend yield for the trailing twelve months is around 0.56%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AOSL Alpha and Omega Semiconductor Limited	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
COST Costco Wholesale Corporation	0.56%	0.59%	0.49%	2.87%	0.76%	0.54%	3.38%	0.86%	1.08%	4.81%	1.09%	4.06%

Financials

AOSL vs. COST - Profitability Comparison

The chart below illustrates the profitability comparison between Alpha and Omega Semiconductor Limited and Costco Wholesale Corporation over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

AOSL - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Alpha and Omega Semiconductor Limited reported a gross profit of 34.53M and revenue of 163.79M. Therefore, the gross margin over that period was 21.1%.

COST - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Costco Wholesale Corporation reported a gross profit of -17.68B and revenue of 70.53B. Therefore, the gross margin over that period was -25.1%.

AOSL - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Alpha and Omega Semiconductor Limited reported an operating income of -14.06M and revenue of 163.79M, resulting in an operating margin of -8.6%.

COST - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Costco Wholesale Corporation reported an operating income of 2.82B and revenue of 70.53B, resulting in an operating margin of 4.0%.

AOSL - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Alpha and Omega Semiconductor Limited reported a net income of 15.42M and revenue of 163.79M, resulting in a net margin of 9.4%.

COST - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Costco Wholesale Corporation reported a net income of 2.19B and revenue of 70.53B, resulting in a net margin of 3.1%.

Frequently Asked Questions

Can I hold both AOSL and COST in my portfolio?

AOSL and COST 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, AOSL or COST?

AOSL has higher volatility (43.20%) compared to COST (7.99%). In terms of maximum drawdown, AOSL dropped -75.27% vs COST's -53.39%.

Which has better risk-adjusted returns?

AOSL currently has the higher Sharpe Ratio (1.99 vs -0.48), 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.