WSO vs. BIL

Last updated Jul 17, 2026

WSO (Watsco, Inc.) is a stock, while BIL (SPDR Bloomberg 1-3 Month T-Bill ETF) is Government Bonds fund tracking the Bloomberg 1-3 Month U.S. Treasury Bill Index. Over the past 10 years, WSO returned 14.25%/yr vs 2.23%/yr for BIL. At a correlation of -0.00, they often move in opposite directions.

Performance

WSO vs. BIL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Watsco, Inc. (WSO) and SPDR Bloomberg 1-3 Month T-Bill ETF (BIL). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, WSO achieves a 17.14% return, which is significantly higher than BIL's 1.92% return. Over the past 10 years, WSO has outperformed BIL with an annualized return of 14.25%, while BIL has yielded a comparatively lower 2.23% annualized return.

WSO

• 1D: 0.32%
• 1M: -0.17%
• 6M: 3.84%
• YTD: 17.14%
• 1Y: -15.63%
• 3Y*: 4.00%
• 5Y*: 9.45%
• 10Y*: 14.25%

BIL

• 1D: 0.01%
• 1M: 0.30%
• 6M: 1.78%
• YTD: 1.92%
• 1Y: 3.81%
• 3Y*: 4.58%
• 5Y*: 3.50%
• 10Y*: 2.23%

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

WSO vs. BIL - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WSO Watsco, Inc.	17.14%	-27.02%	13.22%	77.00%	-17.74%	42.09%	30.57%	34.99%	-15.54%	18.36%
BIL SPDR Bloomberg 1-3 Month T-Bill ETF	1.92%	4.15%	5.19%	4.94%	1.40%	-0.10%	0.40%	2.03%	1.74%	0.69%

Correlation

The correlation between WSO and BIL is -0.00, 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	-0.00
Correlation (3Y) Calculated over the trailing 3-year period	-0.03
Correlation (5Y) Calculated over the trailing 5-year period	-0.01
Correlation (10Y) Calculated over the trailing 10-year period	0.01
Correlation (All Time) Calculated using the full available price history since May 30, 2007	-0.00

Return for Risk

WSO vs. BIL — Risk / Return Rank

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

WSO

WSO Risk / Return Rank: 25
WSO Sharpe Ratio Rank: 22
WSO Sortino Ratio Rank: 22
WSO Omega Ratio Rank: 23
WSO Calmar Ratio Rank: 28
WSO Martin Ratio Rank: 29

BIL

BIL Risk / Return Rank: 100
BIL Sharpe Ratio Rank: 100
BIL Sortino Ratio Rank: 100
BIL Omega Ratio Rank: 100
BIL Calmar Ratio Rank: 100
BIL Martin Ratio Rank: 100

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. BIL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Watsco, Inc. (WSO) and SPDR Bloomberg 1-3 Month T-Bill ETF (BIL). 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	BIL	Difference
Sharpe ratio: Return per unit of total volatility	-0.49	19.02	-19.51
Sortino ratio: Return per unit of downside risk	-0.51	153.14	-153.64
Omega ratio: Gain probability vs. loss probability	0.94	69.35	-68.41
Calmar ratio: Return relative to maximum drawdown	-0.47	349.26	-349.73
Martin ratio: Return relative to average drawdown	-0.77	2,476.82	-2,477.58

WSO vs. BIL - Sharpe Ratio Comparison

The current WSO Sharpe Ratio is -0.49, which is lower than the BIL Sharpe Ratio of 19.02. The chart below compares the historical Sharpe Ratios of WSO and BIL, 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. BIL - Drawdown Comparison

The maximum WSO drawdown since its inception was -64.30%, which is greater than BIL's maximum drawdown of -0.78%. Use the drawdown chart below to compare losses from any high point for WSO and BIL.

Drawdown Indicators

	WSO	BIL	Difference
Max Drawdown Largest peak-to-trough decline	-64.30%	-0.78%	-63.52%
Max Drawdown (1Y) Largest decline over 1 year	-33.42%	-0.01%	-33.41%
Max Drawdown (3Y) Largest decline over 3 years	-41.62%	-0.01%	-41.61%
Max Drawdown (5Y) Largest decline over 5 years	-41.62%	-0.08%	-41.54%
Max Drawdown (10Y) Largest decline over 10 years	-41.62%	-0.21%	-41.41%
Current Drawdown Current decline from peak	-28.77%	0.00%	-28.77%
Average Drawdown Average peak-to-trough decline	-18.07%	-0.26%	-17.81%
Ulcer Index Depth and duration of drawdowns from previous peaks	20.46%	0.00%	+20.46%

Volatility

WSO vs. BIL - Volatility Comparison

Watsco, Inc. (WSO) has a higher volatility of 9.26% compared to SPDR Bloomberg 1-3 Month T-Bill ETF (BIL) at 0.07%. This indicates that WSO's price experiences larger fluctuations and is considered to be riskier than BIL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WSO	BIL	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.26%	0.07%	+9.19%
Volatility (6M) Calculated over the trailing 6-month period	22.94%	0.14%	+22.80%
Volatility (1Y) Calculated over the trailing 1-year period	32.14%	0.20%	+31.94%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	30.37%	0.26%	+30.11%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	27.91%	0.26%	+27.65%

Dividends

WSO vs. BIL - Dividend Comparison

WSO's dividend yield for the trailing twelve months is around 3.27%, less than BIL's 3.81% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BIL SPDR Bloomberg 1-3 Month T-Bill ETF	3.81%	4.13%	5.03%	4.92%	1.35%	0.00%	0.30%	2.05%	1.66%	0.68%	0.07%	0.00%
WSO Watsco, Inc.	3.27%	3.47%	2.23%	2.29%	3.43%	2.44%	3.06%	3.55%	4.02%	2.71%	2.43%	2.39%

Frequently Asked Questions

Can I hold both WSO and BIL in my portfolio?

WSO and BIL have a correlation of -0.00, 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 BIL?

WSO has higher volatility (9.26%) compared to BIL (0.07%). In terms of maximum drawdown, WSO dropped -64.30% vs BIL's -0.78%.

Which has better risk-adjusted returns?

BIL currently has the higher Sharpe Ratio (19.02 vs -0.49), 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.