CMI vs. IEX

Last updated Jun 4, 2026

CMI (Cummins Inc.) and IEX (IDEX Corporation) are both stocks. Both operate in the Specialty Industrial Machinery industry within the Industrials sector. Over the past 10 years, CMI returned 22.76%/yr vs 11.21%/yr for IEX. At a 0.45 correlation, their price movements are largely independent.

Performance

CMI vs. IEX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Cummins Inc. (CMI) and IDEX Corporation (IEX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CMI achieves a 34.54% return, which is significantly higher than IEX's 21.89% return. Over the past 10 years, CMI has outperformed IEX with an annualized return of 22.76%, while IEX has yielded a comparatively lower 11.21% annualized return.

CMI

• 1D: 1.44%
• 1M: 4.22%
• YTD: 34.54%
• 6M: 35.24%
• 1Y: 113.66%
• 3Y*: 49.49%
• 5Y*: 23.76%
• 10Y*: 22.76%

IEX

• 1D: 1.51%
• 1M: 0.83%
• YTD: 21.89%
• 6M: 21.71%
• 1Y: 20.12%
• 3Y*: 2.48%
• 5Y*: 0.36%
• 10Y*: 11.21%

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

CMI vs. IEX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CMI Cummins Inc.	34.54%	49.36%	48.92%	1.72%	14.09%	-1.68%	30.50%	38.04%	-22.06%	32.74%
IEX IDEX Corporation	21.89%	-13.69%	-2.35%	-3.80%	-2.22%	19.82%	17.22%	37.94%	-3.16%	48.53%

Correlation

The correlation between CMI and IEX is 0.59, 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	0.59
Correlation (3Y) Calculated over the trailing 3-year period	0.58
Correlation (5Y) Calculated over the trailing 5-year period	0.57
Correlation (10Y) Calculated over the trailing 10-year period	0.60
Correlation (All Time) Calculated using the full available price history since Jun 24, 1991	0.45

The correlation between CMI and IEX shifts across timeframes, from 0.45 (all time) to 0.60 (10 years), reflecting how their relationship changes across market environments.

Fundamentals

Market Cap CMI : $94.71B IEX : $16.02B
EPS CMI : $19.27 IEX : $6.77
PE Ratio CMI : 35.41 IEX : 31.82
PEG Ratio CMI : 0.39 IEX : 9.39
PS Ratio CMI : 2.79 IEX : 4.58
PB Ratio CMI : 7.67 IEX : 3.96
Total Revenue (TTM) CMI : $33.89B IEX : $3.53B
Gross Profit (TTM) CMI : $8.60B IEX : $1.57B
EBITDA (TTM) CMI : $4.87B IEX : $885.40M

Return for Risk

CMI vs. IEX — Risk / Return Rank

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

CMI

CMI Risk / Return Rank: 95
CMI Sharpe Ratio Rank: 96
CMI Sortino Ratio Rank: 94
CMI Omega Ratio Rank: 94
CMI Calmar Ratio Rank: 95
CMI Martin Ratio Rank: 97

IEX

IEX Risk / Return Rank: 62
IEX Sharpe Ratio Rank: 65
IEX Sortino Ratio Rank: 59
IEX Omega Ratio Rank: 59
IEX Calmar Ratio Rank: 66
IEX Martin Ratio Rank: 63

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.

CMI vs. IEX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Cummins Inc. (CMI) and IDEX Corporation (IEX). 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.

	CMI	IEX	Difference
Sharpe ratio Return per unit of total volatility	3.51	0.79	+2.73
Sortino ratio Return per unit of downside risk	3.99	1.24	+2.75
Omega ratio Gain probability vs. loss probability	1.55	1.16	+0.39
Calmar ratio Return relative to maximum drawdown	7.51	1.33	+6.18
Martin ratio Return relative to average drawdown	27.80	2.59	+25.21
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CMI vs. IEX - Sharpe Ratio Comparison

The current CMI Sharpe Ratio is 3.51, which is higher than the IEX Sharpe Ratio of 0.79. The chart below compares the historical Sharpe Ratios of CMI and IEX, 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

	CMI	IEX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.51	0.79	+2.73
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.85	0.02	+0.84
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.81	0.46	+0.35
Sharpe Ratio (All Time) Calculated using the full available price history	0.38	0.14	+0.24

Drawdowns

CMI vs. IEX - Drawdown Comparison

The maximum CMI drawdown since its inception was -75.66%, smaller than the maximum IEX drawdown of -81.60%. Use the drawdown chart below to compare losses from any high point for CMI and IEX.

Drawdown Indicators

	CMI	IEX	Difference
Max Drawdown Largest peak-to-trough decline	-75.66%	-81.60%	+5.94%
Max Drawdown (1Y) Largest decline over 1 year	-15.23%	-15.17%	-0.06%
Max Drawdown (3Y) Largest decline over 3 years	-30.48%	-34.60%	+4.12%
Max Drawdown (5Y) Largest decline over 5 years	-30.48%	-34.60%	+4.12%
Max Drawdown (10Y) Largest decline over 10 years	-44.05%	-35.52%	-8.53%
Current Drawdown Current decline from peak	-4.46%	-9.57%	+5.11%
Average Drawdown Average peak-to-trough decline	-22.23%	-11.44%	-10.79%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.10%	7.78%	-3.68%

Volatility

CMI vs. IEX - Volatility Comparison

Cummins Inc. (CMI) has a higher volatility of 13.65% compared to IDEX Corporation (IEX) at 5.83%. This indicates that CMI's price experiences larger fluctuations and is considered to be riskier than IEX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CMI	IEX	Difference
Volatility (1M) Calculated over the trailing 1-month period	13.65%	5.83%	+7.82%
Volatility (6M) Calculated over the trailing 6-month period	27.38%	16.95%	+10.43%
Volatility (1Y) Calculated over the trailing 1-year period	32.60%	25.76%	+6.84%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	27.97%	24.02%	+3.95%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	28.22%	24.25%	+3.97%

Dividends

CMI vs. IEX - Dividend Comparison

CMI's dividend yield for the trailing twelve months is around 1.17%, less than IEX's 1.33% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CMI Cummins Inc.	1.17%	1.50%	2.01%	2.71%	2.49%	2.57%	2.33%	2.74%	3.32%	2.38%	2.93%	3.99%
IEX IDEX Corporation	1.33%	1.58%	1.29%	1.16%	1.02%	0.90%	1.00%	1.12%	1.31%	1.10%	1.49%	1.62%

Financials

CMI vs. IEX - Profitability Comparison

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

CMI - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Cummins Inc. reported a gross profit of 2.24B and revenue of 8.40B. Therefore, the gross margin over that period was 26.7%.

IEX - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, IDEX Corporation reported a gross profit of 398.10M and revenue of 886.90M. Therefore, the gross margin over that period was 44.9%.

CMI - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Cummins Inc. reported an operating income of 949.00M and revenue of 8.40B, resulting in an operating margin of 11.3%.

IEX - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, IDEX Corporation reported an operating income of 172.40M and revenue of 886.90M, resulting in an operating margin of 19.4%.

CMI - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Cummins Inc. reported a net income of 654.00M and revenue of 8.40B, resulting in a net margin of 7.8%.

IEX - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, IDEX Corporation reported a net income of 120.00M and revenue of 886.90M, resulting in a net margin of 13.5%.

Frequently Asked Questions

Can I hold both CMI and IEX in my portfolio?

CMI and IEX have a correlation of 0.59, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CMI or IEX?

CMI has higher volatility (13.65%) compared to IEX (5.83%). In terms of maximum drawdown, CMI dropped -75.66% vs IEX's -81.60%.

Which has better risk-adjusted returns?

CMI currently has the higher Sharpe Ratio (3.51 vs 0.79), 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.