WSO vs. APH

Last updated Jun 16, 2026

WSO (Watsco, Inc.) and APH (Amphenol Corporation) are both stocks. WSO operates in Industrial Distribution (Industrials), while APH operates in Electronic Components (Technology). Over the past 10 years, WSO returned 14.68%/yr vs 28.29%/yr for APH. At a 0.32 correlation, their price movements are largely independent.

Performance

WSO vs. APH - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Watsco, Inc. (WSO) and Amphenol Corporation (APH). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, WSO achieves a 16.03% return, which is significantly lower than APH's 17.58% return. Over the past 10 years, WSO has underperformed APH with an annualized return of 14.68%, while APH has yielded a comparatively higher 28.29% annualized return.

WSO

• 1D: 1.14%
• 1M: -4.55%
• YTD: 16.03%
• 6M: 13.46%
• 1Y: -8.15%
• 3Y*: 4.33%
• 5Y*: 9.38%
• 10Y*: 14.68%

APH

• 1D: 3.11%
• 1M: 26.87%
• YTD: 17.58%
• 6M: 22.56%
• 1Y: 72.68%
• 3Y*: 58.07%
• 5Y*: 37.31%
• 10Y*: 28.29%

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

WSO vs. APH - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WSO Watsco, Inc.	16.03%	-27.02%	13.22%	77.00%	-17.74%	42.09%	30.57%	34.99%	-15.54%	18.36%
APH Amphenol Corporation	17.58%	96.08%	41.30%	31.85%	-11.96%	35.25%	22.09%	34.91%	-6.82%	31.81%

Correlation

The correlation between WSO and APH is 0.17, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.17
Correlation (3Y) Calculated over the trailing 3-year period	0.37
Correlation (5Y) Calculated over the trailing 5-year period	0.47
Correlation (10Y) Calculated over the trailing 10-year period	0.45
Correlation (All Time) Calculated using the full available price history since Nov 8, 1991	0.32

The correlation between WSO and APH shifts across timeframes, from 0.17 (1 year) to 0.47 (5 years), reflecting how their relationship changes across market environments.

Fundamentals

Market Cap WSO : $14.61B APH : $204.53B
EPS WSO : $13.08 APH : $4.58
PE Ratio WSO : 29.42 APH : 34.59
PEG Ratio WSO : 5.72 APH : 1.15
PS Ratio WSO : 2.02 APH : 7.85
PB Ratio WSO : 4.54 APH : 14.63
Total Revenue (TTM) WSO : $7.24B APH : $25.90B
Gross Profit (TTM) WSO : $2.05B APH : $9.67B
EBITDA (TTM) WSO : $778.38M APH : $7.45B

Return for Risk

WSO vs. APH — Risk / Return Rank

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

WSO

WSO Risk / Return Rank: 31
WSO Sharpe Ratio Rank: 31
WSO Sortino Ratio Rank: 28
WSO Omega Ratio Rank: 28
WSO Calmar Ratio Rank: 34
WSO Martin Ratio Rank: 35

APH

APH Risk / Return Rank: 82
APH Sharpe Ratio Rank: 86
APH Sortino Ratio Rank: 79
APH Omega Ratio Rank: 82
APH Calmar Ratio Rank: 81
APH Martin Ratio Rank: 81

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.

WSO vs. APH - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Watsco, Inc. (WSO) and Amphenol Corporation (APH). 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.

	WSO	APH	Difference
Sharpe ratio: Return per unit of total volatility	-0.26	1.75	-2.01
Sortino ratio: Return per unit of downside risk	-0.16	2.17	-2.32
Omega ratio: Gain probability vs. loss probability	0.98	1.30	-0.32
Calmar ratio: Return relative to maximum drawdown	-0.24	2.59	-2.84
Martin ratio: Return relative to average drawdown	-0.41	6.68	-7.09

WSO vs. APH - Sharpe Ratio Comparison

The current WSO Sharpe Ratio is -0.26, which is lower than the APH Sharpe Ratio of 1.75. The chart below compares the historical Sharpe Ratios of WSO and APH, 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

WSO vs. APH - Drawdown Comparison

The maximum WSO drawdown since its inception was -64.30%, roughly equal to the maximum APH drawdown of -63.41%. Use the drawdown chart below to compare losses from any high point for WSO and APH.

Drawdown Indicators

	WSO	APH	Difference
Max Drawdown Largest peak-to-trough decline	-64.30%	-63.41%	-0.89%
Max Drawdown (1Y) Largest decline over 1 year	-33.42%	-28.19%	-5.23%
Max Drawdown (3Y) Largest decline over 3 years	-41.62%	-28.19%	-13.43%
Max Drawdown (5Y) Largest decline over 5 years	-41.62%	-28.73%	-12.89%
Max Drawdown (10Y) Largest decline over 10 years	-41.62%	-37.56%	-4.06%
Current Drawdown Current decline from peak	-29.44%	-4.42%	-25.02%
Average Drawdown Average peak-to-trough decline	-18.06%	-13.56%	-4.50%
Ulcer Index Depth and duration of drawdowns from previous peaks	19.84%	10.92%	+8.92%

Volatility

WSO vs. APH - Volatility Comparison

The current volatility for Watsco, Inc. (WSO) is 9.18%, while Amphenol Corporation (APH) has a volatility of 15.42%. This indicates that WSO experiences smaller price fluctuations and is considered to be less risky than APH based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WSO	APH	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.18%	15.42%	-6.24%
Volatility (6M) Calculated over the trailing 6-month period	22.53%	37.51%	-14.98%
Volatility (1Y) Calculated over the trailing 1-year period	31.51%	41.76%	-10.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	30.21%	30.79%	-0.58%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	27.84%	27.96%	-0.12%

Dividends

WSO vs. APH - Dividend Comparison

WSO's dividend yield for the trailing twelve months is around 3.20%, more than APH's 0.52% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
APH Amphenol Corporation	0.52%	0.55%	0.79%	1.07%	1.06%	0.89%	0.80%	0.89%	1.09%	0.80%	0.86%	1.01%
WSO Watsco, Inc.	3.20%	3.47%	2.23%	2.29%	3.43%	2.44%	3.06%	3.55%	4.02%	2.71%	2.43%	2.39%

Financials

WSO vs. APH - Profitability Comparison

The chart below illustrates the profitability comparison between Watsco, Inc. and Amphenol Corporation over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

WSO - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Watsco, Inc. reported a gross profit of 427.56M and revenue of 1.53B. Therefore, the gross margin over that period was 27.9%.

APH - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Amphenol Corporation reported a gross profit of 2.80B and revenue of 7.62B. Therefore, the gross margin over that period was 36.8%.

WSO - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Watsco, Inc. reported an operating income of 110.18M and revenue of 1.53B, resulting in an operating margin of 7.2%.

APH - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Amphenol Corporation reported an operating income of 1.83B and revenue of 7.62B, resulting in an operating margin of 24.0%.

WSO - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Watsco, Inc. reported a net income of 79.07M and revenue of 1.53B, resulting in a net margin of 5.2%.

APH - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Amphenol Corporation reported a net income of 2.35B and revenue of 7.62B, resulting in a net margin of 30.8%.

Frequently Asked Questions

Can I hold both WSO and APH in my portfolio?

WSO and APH have a correlation of 0.17, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, WSO or APH?

APH has higher volatility (15.42%) compared to WSO (9.18%). In terms of maximum drawdown, WSO dropped -64.30% vs APH's -63.41%.

Which has better risk-adjusted returns?

APH currently has the higher Sharpe Ratio (1.75 vs -0.26), 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.