Caixin PMI China — the private gauge and the Aussie dollar

It is early morning in Europe, most traders are still asleep, and a single number from China lands on the markets in Sydney and Tokyo. This is the Caixin PMI — a private survey of purchasing managers at Chinese firms. When the print misses the forecast, it is the Australian and New Zealand dollars that twitch first, not the greenback. In this article I explain how Caixin differs from China's official government index and why, for a European trader, this is data worth waking up early for.

What the Caixin PMI actually is

The Caixin PMI is a monthly survey of sentiment among purchasing managers at Chinese companies. PMI stands for Purchasing Managers' Index. The survey is compiled by S&P Global and sponsored by Caixin Media, the financial-news group whose name the indicator carries on the market. Each month the survey asks purchasing managers one thing: whether business in their firm is better, the same, or worse than a month earlier.

The indicator comes in several flavours. There is a separate reading for manufacturing, a separate one for services, and a composite built from the two that covers the whole economy. The manufacturing print tends to draw the closest attention, because industry is what pulls Chinese demand for raw materials hardest. Like other PMIs, Caixin is a diffusion index — it does not measure output in yuan, but the share of firms reporting an improvement. That is why it reacts faster than hard data measured in money with a lag.

The 50 line — the border between expansion and contraction

The whole construction of the indicator turns on one number: fifty. It is the point of balance, where as many firms report an improvement as report a worsening. A reading above 50 means the sector is expanding; a reading below 50 means it is contracting. The further from the line, the faster the pace of change: 53 points is solid expansion, while 47 points is a clear drop in activity.

One subtlety is worth keeping in mind. What matters is not only the absolute level but also the direction. A fall from 52 to 50.5 is still expansion, but expansion that is clearly braking — and the market can react to that slowdown alone, even though the number is still above fifty. The second thing is the comparison with the forecast: if analysts expected 49 and the print came in at 50, it is a positive surprise for the market, even though the reading barely clears the line. The reaction to the gap between forecast and actual value is common to every macro release, and I cover it more fully in the piece on the basics of fundamental analysis.

Caixin versus the official NBS index — why two gauges

China publishes two different PMI prints every month, and they are easy to confuse. The first is the official index, released by the National Bureau of Statistics (NBS) — that is, a government body. The second is Caixin, a private survey. They differ not only in their publisher but, above all, in their sample of firms.

The official NBS index leans more heavily toward large state-owned enterprises — big plants, often closely tied to Beijing's economic policy. The Caixin sample, by contrast, tilts toward smaller, privately owned firms that are more export-oriented. That is why the two gauges can diverge: it happens that the government index shows mild expansion while Caixin in the same month shows activity contracting. Neither is "truer" — they simply look at different slices of the economy. Read together they give a fuller picture: the official one shows the health of the large, state-owned core, and Caixin the pulse of the private, export-facing margin, which often senses a turn in the cycle sooner.

"Investors are perpetually in search of the currency that offers the highest return — capital flows toward the markets with higher interest rates, and it is those flows that drive long-term currency trends." — Kathy Lien, Day Trading and Swing Trading the Currency Market, Wiley, 2016.

Why Caixin moves the Australian dollar, not the US one

This is the most important thing a European trader should understand about this release. China is the world's largest importer of raw materials and the largest single participant in goods trade. When the Chinese economy speeds up, demand rises for iron ore, coal, copper and gas — and those are exactly the commodities Australia, and to a lesser extent New Zealand, build their exports on. The link between commodity prices and commodity currencies is one I unpack further in the work on intermarket analysis.

So a surprise in Caixin hits the China-sensitive, commodity-linked currencies first: the Australian and New Zealand dollars, and commodity prices themselves. A stronger-than-expected print usually lifts those currencies, because it points to greater demand for Chinese imports; a weaker one weighs on them. On the US dollar Caixin acts far more weakly, and rather indirectly — through the broad mood toward risk, not directly through the trade channel. It is a good illustration of how, on the currency market, a currency reacts to data from its main trading partners, not only to its own prints. I trace the "macro data to price reaction" chain in more detail around the ISM gauge of US manufacturing, which plays a similar role for the dollar that Caixin plays for the Aussie.

The early hour and the thin Asian session

Caixin is released early in the European morning, roughly between 02:45 and 03:45 Central European time depending on the report — morning in Beijing, while it is still night in Europe. For a trader on the Continent the print therefore lands during the Asian session, the thinnest part of the day on the currency market.

Thin liquidity has real consequences. In this window the spread can widen and slippage rises, because there are fewer participants on the other side ready to take an order. The first reaction to a surprising print is often sharp and chaotic, and the direction does not necessarily hold once the London session opens. So the mere fact that the data are important does not mean you have to trade them in the first minute. How to plan for releases like this and set your time zone in the first place, I lay out step by step in the piece on how to use an economic calendar.

What to do after you close this page

1. Add Caixin to your economic calendar. Open the calendar at your broker or on a macro portal, set the time zone to your local one, and flag the monthly Caixin manufacturing and services prints as high-impact events. That way the early-morning spike in volatility on the Australian dollar will not catch you off guard.
2. Put Caixin next to the official print. At the next release, write the Caixin index and the government NBS index for the same month side by side. Check whether both sit on the same side of fifty or diverge — a gap is a signal that the private, export-facing margin of the economy feels something different from the state-owned core.
3. Compare the print with the forecast, not with fifty. Before you judge whether a result is good, check what the market expected. The price reaction depends on the gap between the print and the consensus forecast, not on the absolute value. Note the forecast in advance and set it against the release at the moment of the print.
4. Watch the pair with the Australian dollar, not the US one. Since Caixin hits the commodity currencies first, learn to read the market's reaction to this gauge on them. After the release, wait for the first chaotic wave on the thin Asian session to cool down, and only then judge whether the rate has settled into a direction in line with the surprise.