ASX 200 P/E ratio as at 22 September 2026

As at 22 September 2026, State Street reported the S&P/ASX 200’s price-to-earnings (P/E) ratio in its index characteristics at 19.47 times trailing earnings and 17.70 times FY1 forward earnings. The trailing figure used the last 12 months of mean earnings per share; the FY1 figure used the mean estimate for each company’s next unreported financial year.

That is the cleanest dated answer located on a public page that explicitly labels the S&P/ASX 200 index, the date and both earnings horizons. It is still a State Street calculation shown on the page for the SPDR S&P/ASX 200 ETF (STW), not a P/E figure published on S&P Dow Jones Indices’ public S&P/ASX 200 page. The distinction matters. State Street’s product page is rolling, so these figures are a snapshot of what it reported for 22 September 2026; the live URL may later show a newer date and different values.

Other figures are not necessarily wrong. They may measure an ETF portfolio, the All Ordinaries, the MSCI Australia Index, a different date or a different earnings definition. Put the label back on the number and much of the disagreement disappears.

Disclosure: The author or operator may hold STW, IOZ, EWA or related Australian equity funds. No holding is used as evidence. STW and IOZ are Australian-listed S&P/ASX 200 tracker funds, while EWA is a US-listed fund used as an Australia-market proxy. They appear only to distinguish data sources, not as recommendations. No index or fund provider mentioned commissioned or reviewed this article, and there are no affiliate links.

The dated ASX 200 P/E answer

The table below keeps each number attached to its actual measurement object. Do not turn the rows into a range: they are not interchangeable observations of one identical series.

State Street defines its trailing measure as the weighted average of each security’s P/E, using the closing price on the report date divided by mean earnings per share for the preceding 12 months. Its FY1 measure is the weighted average of each security’s price divided by the mean earnings estimate for the next unreported financial year. The page reports the fund and index characteristics separately. On 22 September, the trailing values were both 19.47, while the FY1 values were 17.71 for the fund and 17.70 for the index; matching or near-matching values should not collapse the two measurement objects into one.

BlackRock’s IOZ page is useful as a second official tracker source, but its public 20.52 field is labelled as a portfolio characteristic. The accessible field does not say that it is S&P DJI’s own index P/E, nor does it name a trailing or forward horizon. It therefore belongs in the reconciliation, not in the headline as a substitute for a fully labelled index statistic.

First check what the number actually measures

“Australian shares” can refer to several different baskets.

The S&P/ASX 200 is designed around 200 large, liquid, index-eligible securities listed on ASX and is weighted by float-adjusted market capitalisation. In plain English, each company is weighted using the market value of shares available for public trading, rather than shares locked up by controlling holders. It is the main investable benchmark for Australian equities.

The All Ordinaries is broader. It measures roughly 500 eligible ASX-listed companies, does not use liquidity as an inclusion criterion and is weighted differently. A P/E chart labelled All Ordinaries answers a broader-market question, not the exact ASX 200 question.

MarketIndex’s market-statistics page describes a market-cap-weighted P/E for the Australian stock market rather than labelling the measure as the S&P/ASX 200. That is useful broader-market context, but it is not the exact S&P/ASX 200 measurement object.

EWA is different again. BlackRock’s iShares MSCI Australia ETF is a US-listed fund that tracks the MSCI Australia Index. It held 43 securities on 9 September 2026. A website can reasonably use it as a liquid “Australia” proxy, but the resulting number is still an EWA or MSCI Australia proxy—not the S&P/ASX 200.

The first line of any P/E comparison should therefore read like this:

Universe + earnings basis + aggregation method + as-of date

If one of those fields is missing, the number is incomplete.

How an index P/E is built

For one profitable company, the familiar formula is:

P/E = share price ÷ earnings per share

An index needs an aggregation rule. S&P DJI’s Index Mathematics Methodology calculates an index-level P/E from aggregate index market capitalisation divided by aggregate float-adjusted earnings data. That is economically similar to asking how much the market values the included companies for each dollar of eligible aggregate earnings.

Another provider can instead report a weighted average of constituent P/E ratios, as State Street describes on the STW page. Those approaches need not produce the same answer.

Consider a two-company example:

The aggregate-of-sums P/E is A$100 million divided by A$6 million, or 16.7×. A simple average of the two company ratios is 15×. A market-value-weighted average is 18×. All three calculations use the same two companies, yet they answer slightly different mathematical questions.

What happens to loss-makers?

A company with zero or negative earnings does not have an ordinary positive P/E. Providers then need a rule: keep its loss in aggregate earnings, omit an unavailable constituent ratio, cap an extreme observation or use another convention.

That choice can matter greatly during an earnings slump. Including losses in aggregate earnings reduces the denominator and can push the index P/E sharply higher even when prices have already fallen. Omitting loss-makers from an average of company P/Es can make the remaining profitable group look cheaper than the whole economic basket.

S&P DJI says a stock with no underlying value is excluded from its index-level fundamental-ratio calculation. State Street’s public definition explains the weighted-average calculation but does not set out a separate loss-maker rule on the product page. The responsible conclusion is not to guess: if the treatment is not disclosed, mark it as unknown and avoid false precision.

Why two legitimate sources can disagree

Six differences explain most gaps.

1. The universe is different

ASX 200, All Ordinaries, MSCI Australia and an ETF portfolio can hold different numbers of securities, use different eligibility rules and carry different sector weights. Australia is especially sensitive to the weight of banks and resources companies, whose earnings cycles and accounting profiles differ from those of industrial, healthcare and technology companies.

2. One number is trailing and another is forward

Trailing P/E uses reported earnings from the recent past. Forward P/E uses analyst estimates. The forward figure can be lower because analysts expect earnings to rise, but those estimates can be revised. A 17.70× FY1 P/E is not evidence that the market is definitely cheaper than a 19.47× trailing P/E; it shows what the valuation would be if the relevant earnings estimates are realised.

3. The dates do not match

The comparison above spans 9, 10, 21 and 22 September. Prices can change every trading day, while reported earnings update less frequently and forward estimates change when analysts revise them. A current price sitting over stale earnings is not an error, but it is a lag that belongs in the label.

S&P DJI’s end-of-month fundamental-data method illustrates the issue. It obtains raw data as at the 25th of the month, validates it and calculates month-end ratios for the index composition current on the calculation date. A fund provider’s daily product page can use a different report date and data-update schedule.

4. The aggregation method differs

Aggregate market value divided by aggregate earnings, a weighted average of company P/Es and a simple average are not interchangeable. The treatment of multiple share classes, missing data and extreme values can add further differences.

5. Loss-makers are treated differently

One method can let losses reduce the earnings denominator; another can exclude an unavailable constituent ratio. That difference becomes most visible around recessions, restructures and commodity profit collapses.

6. A tracker fund is not the benchmark

STW’s page makes the distinction unusually clear by publishing fund and index characteristics side by side. On 22 September, the trailing readings were identical to two decimal places, while the FY1 readings differed by 0.01, but the labels still matter. IOZ’s portfolio P/E is also useful evidence about a close-tracking portfolio; it is not permission to call the value S&P DJI’s official index P/E.

How to compare today’s P/E with history

The tempting approach is to search for an “average ASX 200 P/E”, subtract it from today’s number and label the market cheap or expensive. That can produce a clean chart and a weak conclusion.

A defensible comparison follows this sequence:

1. Keep the universe fixed. Compare the S&P/ASX 200 with its own history, not an All Ords, EWA or generic Australian-market series.
2. Keep the earnings horizon fixed. Compare trailing with trailing or FY1 with FY1. Never compare today’s forward P/E with a long-run trailing average without saying that the denominator changed.
3. Keep the aggregation rule fixed. Use the same aggregate or weighted-average method and the same treatment of loss-makers and missing values.
4. Use a consistent observation frequency. Month-end observations usually make a cleaner history than mixing daily snapshots with monthly fundamentals.
5. Record the constituent set and sector mix. A rebalanced index changes through time. A P/E shift can reflect the market repricing the same companies, the earnings cycle, or a change in what the index contains.
6. Inspect the denominator during crises. A high P/E after a price fall may be an earnings-collapse artefact, not evidence that investors suddenly paid more for unchanged profits.
7. Prefer a distribution to one average. A median and percentile range show how unusual today’s reading is without pretending that one mean is a fair-value law.

WorldPEratio reports a five-year average of 17.66× and a current 20.23× reading, but it explicitly builds that series from EWA. Those statistics belong to the EWA-based series. They should not be copied into an “ASX 200 average” table.

The Reserve Bank’s history of Australian equities from 1917 to 2019 is valuable for long-run context. It also shows why historical construction matters: early data, later Datastream series, changing weights and a top-100 company set are joined to study the market over a century. That is not the same thing as a continuous, method-consistent S&P/ASX 200 P/E history. This article therefore does not publish a numeric “long-run ASX 200 average” that the located official sources cannot support.

What today’s P/E can and cannot tell you

At 19.47× trailing earnings, the reciprocal earnings yield is about 5.14%. At 17.70× FY1 earnings, it is about 5.65%. Earnings yield is simply earnings divided by price—the P/E calculation turned upside down.

One useful comparison is with a long-term government-bond yield, often used as a reference for a lower-risk return. Investors normally require an additional expected return from shares because company profits can disappoint; that extra required return is often called the equity risk premium. This article does not estimate that premium or declare the market cheap or expensive. The comparison only helps frame how demanding the valuation may be.

An earnings yield is not cash paid to the investor, a dividend yield or a forecast return. Companies can retain earnings, estimates can fall, interest rates can change and investors can decide to pay a different multiple for the same earnings.

The gap between the trailing and forward readings says that the forward denominator is higher than the trailing denominator under the provider’s estimates. The next question is not simply “Is 17.70 lower?” It is “What earnings growth and margins are required to make it real, and what could interrupt them?”

For the ASX 200, that means looking beyond the headline multiple to the expected profits of banks, miners and other large constituents, as well as the interest rates investors use when valuing future profits. Revenue can rise in dollar terms with inflation while profit margins—the share of revenue left after costs—still shrink if wages, energy, funding or other inputs rise faster. A lower forward P/E based on optimistic profit estimates leaves less room for error than the same multiple based on conservative estimates.

Most importantly, valuation is not a clock. A high P/E can persist while earnings rise or investors accept less extra return for taking equity risk. A lower P/E can stay low when profits are deteriorating or confidence remains weak. A near-term market call therefore needs a catalyst—an event or change that could alter prices—such as a material earnings revision, a move in long-term yields, pressure on profit margins or a shift in money flowing into and out of shares. The multiple alone is not that catalyst.

For a household using an equity portfolio to support future spending, this distinction is practical. A P/E reading can help stress-test assumed returns and the room for error in those assumptions. But an index’s accounting earnings are not cash available for the next mortgage payment or living expense. Money needed on a fixed near-term date should not depend solely on investors later deciding to pay a higher P/E—a change often called a market rerating.

A practical ASX 200 P/E checklist

Before using any figure, write down:

• Index or proxy: S&P/ASX 200, All Ordinaries, MSCI Australia, STW, IOZ or EWA?
• Date: When were the price, earnings and estimates measured?
• Horizon: trailing 12 months, latest financial year, FY1 or another forecast period?
• Aggregation: aggregate market value divided by earnings, weighted average of company ratios or another method?
• Non-earners: Are losses included, unavailable ratios excluded or extremes capped?
• Fund effects: Is this the benchmark or a portfolio designed to track it?
• Historical match: Does the comparison series preserve all of the above?
• Rate hurdle: What risk-free yield and equity-risk compensation are relevant at the same date?
• Earnings test: Which profit, margin and sector assumptions sit behind the forward figure?
• Decision horizon: Is the question about long-run expected return, portfolio risk or a short-term trade?

The useful answer is therefore not “the ASX 200 P/E is exactly one timeless number”. It is:

State Street reported the S&P/ASX 200 index at 19.47× trailing and 17.70× FY1 earnings on 22 September 2026. Keep those figures attached to their date and method, and do not substitute an All Ords, EWA or ETF-portfolio number without relabelling it.

P/E can help frame the price paid for an earnings stream. It cannot, by itself, tell you when the market will turn or whether a particular investor should buy, hold or sell.

This article provides general information only. It does not consider your objectives, financial situation or needs, and it is not personal financial advice.