Question 1

What is the P/E ratio of the S&P 500?

Accepted Answer

The S&P 500 P/E ratio is the aggregate price-to-earnings ratio calculated by dividing the total market capitalisation of all S&P 500 companies by their combined trailing-twelve-month net income. It measures how much investors are paying per dollar of earnings across the index. The historical average is roughly 15-17x.

Question 2

What is the difference between trailing P/E and forward P/E?

Accepted Answer

Trailing P/E uses earnings from the past 12 months (actual reported results). Forward P/E uses consensus analyst earnings estimates for the next 12 months. Forward P/E is typically lower because analysts expect earnings to grow. A large gap between trailing and forward suggests strong expected growth.

Question 3

What is earnings yield?

Accepted Answer

Earnings yield is the inverse of P/E (i.e., 1 / P/E). It expresses how much earnings you get per dollar invested. For example, a P/E of 25 equals a 4% earnings yield. Investors compare earnings yield to risk-free Treasury yields to gauge whether stocks offer adequate compensation over bonds.

Question 4

How is the aggregate P/E calculated?

Accepted Answer

We use the market-cap-weighted method: total market cap of all index members divided by total positive net income (TTM). Loss-making companies contribute zero to the denominator, which is the standard institutional approach used by S&P Global.

Question 5

Why are some sector P/E ratios very high?

Accepted Answer

Sectors with many growth stocks (Technology, Consumer Discretionary) or heavy depreciation (Real Estate/REITs) tend to have elevated P/E ratios. This doesn't necessarily mean overvaluation — forward P/E and EV/EBITDA often give a more balanced picture for these sectors.

Question 6

Is a high P/E ratio bad?

Accepted Answer

Not necessarily. A high P/E can reflect strong expected growth (justified by forward earnings), a low-risk industry premium, or genuine overvaluation. Compare trailing P/E with forward P/E: if forward P/E is significantly lower, earnings are expected to grow, which may justify the current premium.

Index	P/E	Fwd P/E	P/B	EV/EBITDA	Earn. Yield	Div. Yield	Median P/E	Mkt Cap	Stocks
S&P 500	31.7	21.6	5.90	20.8	3.1%	0.97%	25.6	$74.4T	502
Nasdaq 100	40.3	23.8	11.02	27.9	2.5%	0.40%	33.3	$43.9T	100
Dow 30	32.9	24.5	9.42	23.5	3.0%	0.76%	27.7	$25.5T	30
Russell 1000	34.8	14.8	6.32	23.4	2.9%	0.68%	24.7	$61.9T	991
Russell 2000	24.1	19.7	2.30	13.8	4.2%	1.55%	17.7	$3.7T	1937

Sector	P/E	Fwd P/E	EV/EBITDA	Div Yield	Weight	Stocks
Technology	45.3	28.4	32.6	0.41%	36.6%	86
Communication Services	27.7	17.1	18.9	0.49%	15.7%	21
Financial Services	18.5	15.7	16.0	1.49%	11.0%	70
Consumer Cyclical	36.5	24.0	20.8	0.58%	8.9%	51
Healthcare	31.0	21.4	17.9	1.46%	8.6%	60
Industrials	30.4	25.1	19.2	1.49%	6.0%	68
Consumer Defensive	30.3	23.2	18.9	2.20%	4.7%	37
Energy	25.5	12.3	11.2	2.37%	3.3%	22
Utilities	22.9	18.7	14.5	2.37%	2.1%	32
Real Estate	36.5	34.3	21.9	3.40%	1.5%	31
Basic Materials	33.9	19.2	15.8	1.69%	1.5%	24

#	Ticker	Company	Sector	P/E	Fwd P/E
1	CHTR	Charter Communications, Inc.	Communication Services	2.9	2.5
2	CMCSA	Comcast Corporation	Communication Services	3.8	6.0
3	EIX	Edison International	Utilities	4.8	9.0
4	ALL	The Allstate Corporation	Financial Services	6.0	6.5
5	LULU	Lululemon Athletica Inc.	Consumer Cyclical	7.1	7.2
6	FISV	Fiserv, Inc.	Technology	7.2	6.3
7	T	AT&T Inc.	Communication Services	7.3	9.5
8	UHS	Universal Health Services, Inc.	Healthcare	7.7	7.9
9	SYF	Synchrony Financial	Financial Services	7.8	7.8
10	ACGL	Arch Capital Group Ltd.	Financial Services	8.2	9.9

#	Ticker	Company	Sector	P/E	Fwd P/E
1	EL	The Estée Lauder Companies Inc.	Consumer Defensive	196.1	29.5
2	AMD	Advanced Micro Devices, Inc.	Technology	229.5	79.6
3	IRM	Iron Mountain Incorporated	Real Estate	233.7	46.0
4	PANW	Palo Alto Networks, Inc.	Technology	261.7	100.0
5	ON	ON Semiconductor Corporation	Technology	267.3	24.2
6	GPC	Genuine Parts Company	Consumer Cyclical	270.3	16.4
7	AXON	Axon Enterprise, Inc.	Industrials	280.1	54.9
8	MCHP	Microchip Technology Incorporated	Technology	290.6	48.2
9	PLTR	Palantir Technologies Inc.	Technology	331.8	130.8
10	TSLA	Tesla, Inc.	Consumer Cyclical	354.4	223.4

S&P 500 Valuation Dashboard

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