AOS vs. AFL

Last updated Apr 1, 2026

Compare and contrast key facts about A. O. Smith Corporation (AOS) and Aflac Incorporated (AFL).

Performance

AOS vs. AFL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in A. O. Smith Corporation (AOS) and Aflac Incorporated (AFL). The values are adjusted to include any dividend payments, if applicable.

AOS vs. AFL - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AOS A. O. Smith Corporation	-0.92%	0.07%	-15.92%	47.30%	-32.07%	59.28%	17.46%	13.65%	-29.35%	30.78%
AFL Aflac Incorporated	0.02%	8.94%	28.08%	17.36%	26.41%	34.55%	-13.60%	18.55%	6.20%	29.02%

Fundamentals

Market Cap AOS : $9.23B AFL : $58.37B
EPS AOS : $3.87 AFL : $6.83
PE Ratio AOS : 17.05 AFL : 16.07
PEG Ratio AOS : 0.70 AFL : 4.17
PS Ratio AOS : 2.43 AFL : 3.38
PB Ratio AOS : 4.33 AFL : 1.98
Total Revenue (TTM) AOS : $3.83B AFL : $17.36B
Gross Profit (TTM) AOS : $1.49B AFL : $6.71B
EBITDA (TTM) AOS : $792.20M AFL : $5.53B

Returns By Period

In the year-to-date period, AOS achieves a -0.92% return, which is significantly lower than AFL's 0.02% return. Over the past 10 years, AOS has underperformed AFL with an annualized return of 7.24%, while AFL has yielded a comparatively higher 15.76% annualized return.

AOS

• 1D: 3.55%
• 1M: -15.46%
• YTD: -0.92%
• 6M: -9.24%
• 1Y: 2.95%
• 3Y*: 0.38%
• 5Y*: 1.32%
• 10Y*: 7.24%

AFL

• 1D: 1.42%
• 1M: -2.85%
• YTD: 0.02%
• 6M: -0.74%
• 1Y: 0.81%
• 3Y*: 21.99%
• 5Y*: 19.06%
• 10Y*: 15.76%

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

Return for Risk

AOS vs. AFL — Risk / Return Rank

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

AOS

AOS Risk / Return Rank: 43
AOS Sharpe Ratio Rank: 46
AOS Sortino Ratio Rank: 39
AOS Omega Ratio Rank: 38
AOS Calmar Ratio Rank: 45
AOS Martin Ratio Rank: 46

AFL

AFL Risk / Return Rank: 41
AFL Sharpe Ratio Rank: 43
AFL Sortino Ratio Rank: 35
AFL Omega Ratio Rank: 35
AFL Calmar Ratio Rank: 47
AFL Martin Ratio Rank: 47

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.

AOS vs. AFL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for A. O. Smith Corporation (AOS) and Aflac Incorporated (AFL). 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.

	AOS	AFL	Difference
Sharpe ratio Return per unit of total volatility	0.11	0.04	+0.07
Sortino ratio Return per unit of downside risk	0.36	0.19	+0.16
Omega ratio Gain probability vs. loss probability	1.04	1.03	+0.02
Calmar ratio Return relative to maximum drawdown	0.12	0.17	-0.05
Martin ratio Return relative to average drawdown	0.34	0.37	-0.03
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AOS vs. AFL - Sharpe Ratio Comparison

The current AOS Sharpe Ratio is 0.11, which is higher than the AFL Sharpe Ratio of 0.04. The chart below compares the historical Sharpe Ratios of AOS and AFL, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	AOS	AFL	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.11	0.04	+0.07
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.05	0.92	-0.87
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.27	0.62	-0.35
Sharpe Ratio (All Time) Calculated using the full available price history	0.43	0.48	-0.04

Correlation

The correlation between AOS and AFL is 0.28, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

AOS vs. AFL - Dividend Comparison

AOS's dividend yield for the trailing twelve months is around 2.12%, which matches AFL's 2.14% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AOS A. O. Smith Corporation	2.12%	2.06%	1.91%	1.84%	1.99%	1.23%	1.79%	1.89%	1.78%	0.91%	1.01%	0.99%
AFL Aflac Incorporated	2.14%	2.10%	1.93%	2.04%	2.22%	2.26%	2.52%	2.04%	2.28%	1.98%	2.39%	2.64%

Drawdowns

AOS vs. AFL - Drawdown Comparison

The maximum AOS drawdown since its inception was -66.07%, smaller than the maximum AFL drawdown of -82.71%. Use the drawdown chart below to compare losses from any high point for AOS and AFL.

Drawdown Indicators

	AOS	AFL	Difference
Max Drawdown Largest peak-to-trough decline	-66.07%	-82.71%	+16.64%
Max Drawdown (1Y) Largest decline over 1 year	-20.86%	-12.29%	-8.57%
Max Drawdown (5Y) Largest decline over 5 years	-42.68%	-19.86%	-22.82%
Max Drawdown (10Y) Largest decline over 10 years	-46.81%	-54.89%	+8.08%
Current Drawdown Current decline from peak	-25.86%	-6.11%	-19.75%
Average Drawdown Average peak-to-trough decline	-20.43%	-11.70%	-8.73%
Ulcer Index Depth and duration of drawdowns from previous peaks	7.63%	5.67%	+1.96%

Volatility

AOS vs. AFL - Volatility Comparison

A. O. Smith Corporation (AOS) has a higher volatility of 8.01% compared to Aflac Incorporated (AFL) at 4.32%. This indicates that AOS's price experiences larger fluctuations and is considered to be riskier than AFL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AOS	AFL	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.01%	4.32%	+3.69%
Volatility (6M) Calculated over the trailing 6-month period	17.28%	11.80%	+5.48%
Volatility (1Y) Calculated over the trailing 1-year period	25.87%	20.45%	+5.42%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.94%	20.86%	+6.08%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	26.90%	25.70%	+1.20%

Financials

AOS vs. AFL - Profitability Comparison

The chart below illustrates the profitability comparison between A. O. Smith Corporation and Aflac Incorporated over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

AOS - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, A. O. Smith Corporation reported a gross profit of 350.40M and revenue of 912.50M. Therefore, the gross margin over that period was 38.4%.

AFL - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Aflac Incorporated reported a gross profit of 2.93B and revenue of 4.90B. Therefore, the gross margin over that period was 59.9%.

AOS - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, A. O. Smith Corporation reported an operating income of 163.80M and revenue of 912.50M, resulting in an operating margin of 18.0%.

AFL - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Aflac Incorporated reported an operating income of 1.60B and revenue of 4.90B, resulting in an operating margin of 32.7%.

AOS - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, A. O. Smith Corporation reported a net income of 125.40M and revenue of 912.50M, resulting in a net margin of 13.7%.

AFL - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Aflac Incorporated reported a net income of 1.38B and revenue of 4.90B, resulting in a net margin of 28.2%.