AER vs. IEX: AerCap vs. IDEX Stock Comparison

November 11, 2026

How do AerCap (AER) and IDEX (IEX) stack up? This page sets them side by side across company profile, performance and risk, profitability, growth, financial strength, dividends, and valuation, with selected fundamentals also measured against each stock's industry-group peers.

Company Profile

AerCap (AER) and IDEX (IEX) both fall under the Capital Goods industry group, but AER is classified in Trading Companies & Distributors while IEX is classified in Machinery.

Company profile comparison for AerCap (AER) and IDEX (IEX)
Profile Item	AER	IEX
Name	AerCap Holdings N.V.	IDEX Corporation
Country/Region	Ireland	United States
GICS Sector	Industrials	Industrials
GICS Industry Group	Capital Goods	Capital Goods
GICS Industry	Trading Companies & Distributors	Machinery
GICS Sub-Industry	Trading Companies & Distributors	Industrial Machinery & Supplies & Components
Market Capitalization	25.76 billion USD	16.67 billion USD
Currency	USD	USD
Exchange	NYSE	NYSE
Listing Date	November 21, 2006	June 2, 1989
Security Type	Common Stock	Common Stock

Price Performance

Cumulative Growth

AER

IEX

GSPC

AerCap (AER) vs. IDEX (IEX), with S&P 500 (GSPC) for reference: Growth of a $10,000 investment over the past five years. Adjusted for dividends and splits.

Trailing Returns

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Trailing total returns for AerCap (AER) and IDEX (IEX). Returns over one year are annualized.

Calendar-Year Returns

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Calendar-year total returns for AerCap (AER) and IDEX (IEX). Each bar is that year's total return, measured year-end to year-end.

Performance Metrics

Price performance metrics for AerCap (AER) and IDEX (IEX)
Metric	AER	IEX
Total Return (1Y)	32.17%	42.33%
Total Return (3Y, Annualized)	39.43%	8.92%
Total Return (5Y, Annualized)	21.06%	1.31%

Risk Profile

Drawdown History

AER

IEX

GSPC

AerCap (AER) vs. IDEX (IEX), with S&P 500 (GSPC) for reference: Drawdown from the running peak over the past five years. Each line shows the decline from its prior peak; 0% marks a new high.

Return Distribution

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Distribution of monthly total returns for AerCap (AER) and IDEX (IEX). Each bar is the share of months whose return fell in that 5% bucket.

Risk Metrics

Risk profile metrics for AerCap (AER) and IDEX (IEX)
Metric	AER	IEX
Volatility (1Y, Annualized)	26.10%	22.98%
Beta (5Y)	0.95	0.95
Max Drawdown (5Y)	-44.81%	-34.60%
Avg. Volume (3M)	1.13M	666.74K

Risk-Adjusted Performance

Risk-Return Positioning

AER and IEX are plotted by 1-year volatility (risk) and 1-year return. The dashed Capital Allocation Line runs from the risk-free rate through the shared industry median.

Risk-Adjusted Metrics

Risk-adjusted metrics for AerCap (AER) and IDEX (IEX)
Metric	AER	IEX
Sharpe Ratio (1Y)	1.07	1.66
Sortino Ratio (1Y)	1.59	2.64

Profitability

ROE (TTM)

Both AerCap (AER) at 17.00% and IDEX (IEX) at 13.35% land near their industries’ usual ROE ranges, so capital efficiency looks broadly in line with peers on both sides.

AER

Capital Goods industry group

17.00%

Max: 40.55%
Q3: 19.29%
AER: 17.00%
Median: 12.12%
Q1: 4.08%
Min: -17.12%

IEX

Capital Goods industry group

13.35%

Max: 40.55%
Q3: 19.29%
IEX: 13.35%
Median: 12.12%
Q1: 4.08%
Min: -17.12%

AerCap (AER) vs. IDEX (IEX): A comparison of their ROE against the Capital Goods industry group benchmark.

Net Margin (TTM)

AerCap (AER) at 34.47% keeps the most of each sales dollar — above its industry’s net margin range — and IDEX (IEX) at 14.65% also retains a top-quartile share.

AER

Capital Goods industry group

34.47%

AER: 34.47%
Max: 27.47%
Q3: 12.10%
Median: 6.30%
Q1: 1.40%
Min: -12.89%

IEX

Capital Goods industry group

14.65%

Max: 27.47%
IEX: 14.65%
Q3: 12.10%
Median: 6.30%
Q1: 1.40%
Min: -12.89%

AerCap (AER) vs. IDEX (IEX): A comparison of their net margin against the Capital Goods industry group benchmark.

Operating Margin (TTM)

AerCap (AER) at 62.55% shows unusually strong operating efficiency — above its industry’s operating margin range — and IDEX (IEX) at 22.33% also operates in the top quartile.

AER

Capital Goods industry group

62.55%

AER: 62.55%
Max: 36.60%
Q3: 18.33%
Median: 11.12%
Q1: 5.14%
Min: -12.63%

IEX

Capital Goods industry group

22.33%

Max: 36.60%
IEX: 22.33%
Q3: 18.33%
Median: 11.12%
Q1: 5.14%
Min: -12.63%

AerCap (AER) vs. IDEX (IEX): A comparison of their operating margin against the Capital Goods industry group benchmark.

Profitability Metrics

Profitability metrics for AerCap (AER) and IDEX (IEX)
Metric	AER	IEX
ROE (TTM)	17.00%	13.35%
ROA (TTM)	4.52%	7.06%
Net Margin (TTM)	34.47%	14.65%
Operating Margin (TTM)	62.55%	22.33%
Gross Margin (TTM)	63.02%	44.91%

Growth

Revenue Growth

Both AerCap (AER) at 6.50% and IDEX (IEX) at 5.77% land near their industries' usual revenue growth ranges, so top-line momentum looks broadly in line with peers on both sides.

AerCap (AER) vs. IDEX (IEX): A comparison of their Revenue Growth across different time periods.

EPS Growth

AerCap (AER) at 97.41% sits in the top EPS growth quartile, while IDEX (IEX) at -3.46% is closer to the peer norm — faster per-share earnings growth for AER.

AerCap (AER) vs. IDEX (IEX): A comparison of their EPS Growth across different time periods.

Growth Metrics

Growth metrics for AerCap (AER) and IDEX (IEX)
Metric	AER	IEX
Revenue Growth (YoY)	6.50%	5.77%
Revenue Growth (3Y CAGR)	6.69%	2.81%
EPS Growth (YoY)	97.41%	-3.46%
EPS Growth (3Y CAGR)	--	-5.97%

Financial Strength

Current Ratio (MRQ)

Both AerCap (AER) at 1.45 and IDEX (IEX) at 2.78 carry current ratio within their industries’ typical mid-ranges, suggesting balanced short-term liquidity relative to peers.

AER

Capital Goods industry group

1.45

Max: 5.22
Q3: 2.95
Median: 2.08
AER: 1.45
Q1: 1.43
Min: 0.36

IEX

Capital Goods industry group

2.78

Max: 5.22
Q3: 2.95
IEX: 2.78
Median: 2.08
Q1: 1.43
Min: 0.36

AerCap (AER) vs. IDEX (IEX): A comparison of their current ratio against the Capital Goods industry group benchmark.

Debt / Equity (MRQ)

IDEX (IEX) at 0.44 carries an industry-typical debt-to-equity mix, while AerCap (AER) at 2.33 uses more debt funding than most peers.

AER

Capital Goods industry group

2.33

AER: 2.33
Max: 2.33
Q3: 1.12
Median: 0.60
Q1: 0.29
Min: 0.00

IEX

Capital Goods industry group

0.44

Max: 2.33
Q3: 1.12
Median: 0.60
IEX: 0.44
Q1: 0.29
Min: 0.00

AerCap (AER) vs. IDEX (IEX): A comparison of their debt-to-equity ratio against the Capital Goods industry group benchmark.

Financial Strength Metrics

Financial strength metrics for AerCap (AER) and IDEX (IEX)
Metric	AER	IEX
Current Ratio (MRQ)	1.45	2.78
Debt / Equity (MRQ)	2.33	0.44
Net Debt / EBITDA	7.77	1.18

Dividends

Dividend Yield (TTM)

IDEX (IEX) at 1.30% delivers top-quartile income for its industry, while AerCap (AER) at 0.96% pays a more typical yield — both are credible income propositions, IEX the richer one.

AER

Capital Goods industry group

0.96%

Max: 2.66%
Q3: 1.14%
AER: 0.96%
Median: 0.24%
Q1: 0.00%
Min: 0.00%

IEX

Capital Goods industry group

1.30%

Max: 2.66%
IEX: 1.30%
Q3: 1.14%
Median: 0.24%
Q1: 0.00%
Min: 0.00%

AerCap (AER) vs. IDEX (IEX): A comparison of their dividend yield against the Capital Goods industry group benchmark.

Dividend Payout Ratio (TTM)

AerCap (AER) at 7.52% pays out a band-typical share of earnings, while IDEX (IEX) at 50.14% distributes more than its industry norm — less retained, thinner cover.

AER

Capital Goods industry group

7.52%

Max: 67.39%
Q3: 28.02%
AER: 7.52%
Median: 6.86%
Q1: 0.00%
Min: 0.00%

IEX

Capital Goods industry group

50.14%

Max: 67.39%
IEX: 50.14%
Q3: 28.02%
Median: 6.86%
Q1: 0.00%
Min: 0.00%

AerCap (AER) vs. IDEX (IEX): A comparison of their payout ratio against the Capital Goods industry group benchmark.

Dividend Metrics

Dividend metrics for AerCap (AER) and IDEX (IEX)
Metric	AER	IEX
Dividend Yield (TTM)	0.96%	1.30%
Dividend Payout Ratio (TTM)	7.52%	50.14%

Valuation

P/E Ratio (TTM)

AerCap (AER) at 8.67 sits in the cheaper P/E ratio quartile, while IDEX (IEX) at 31.53 is closer to its industry’s usual earnings multiple — a discount for AER, though growth and earnings durability still matter.

AER

Capital Goods industry group

8.67

Max: 59.38
Q3: 35.92
Median: 25.41
Q1: 19.47
AER: 8.67
Min: 3.03

IEX

Capital Goods industry group

31.53

Max: 59.38
Q3: 35.92
IEX: 31.53
Median: 25.41
Q1: 19.47
Min: 3.03

AerCap (AER) vs. IDEX (IEX): A comparison of their P/E ratio against the Capital Goods industry group benchmark.

P/S Ratio (TTM)

AerCap (AER) at 2.84 is priced about in line with its industry on P/S ratio, while IDEX (IEX) at 4.56 sits in the pricier quartile — IEX costs more per dollar of sales.

AER

Capital Goods industry group

2.84

Max: 7.54
Q3: 3.76
AER: 2.84
Median: 2.15
Q1: 1.03
Min: 0.03

IEX

Capital Goods industry group

4.56

Max: 7.54
IEX: 4.56
Q3: 3.76
Median: 2.15
Q1: 1.03
Min: 0.03

AerCap (AER) vs. IDEX (IEX): A comparison of their P/S ratio against the Capital Goods industry group benchmark.

P/B Ratio (MRQ)

AerCap (AER) at 1.36 sits in the lower P/B ratio quartile against book while IDEX (IEX) at 4.17 is valued near its industry’s middle — AER is cheaper on assets, though weigh it against ROE and asset quality.

AER

Capital Goods industry group

1.36

Max: 9.66
Q3: 5.00
Median: 3.12
Q1: 1.81
AER: 1.36
Min: -1.08

IEX

Capital Goods industry group

4.17

Max: 9.66
Q3: 5.00
IEX: 4.17
Median: 3.12
Q1: 1.81
Min: -1.08

AerCap (AER) vs. IDEX (IEX): A comparison of their P/B ratio against the Capital Goods industry group benchmark.

Valuation Metrics

Valuation metrics for AerCap (AER) and IDEX (IEX)
Metric	AER	IEX
P/E Ratio (TTM)	8.67	31.53
P/S Ratio (TTM)	2.84	4.56
P/B Ratio (MRQ)	1.36	4.17
Free Cash Flow Yield (TTM)	-6.60%	3.50%