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Official Japan GDP data corroborate PMI signal of steady Q2 growth
- Rebound in GDP adds to survey evidence of economy growing at steady pace
- PMI acts are reliable guide to help see through volatile GDP numbers
- Survey hints at slower growth in Q3
Japanese economic growth rebounded in the second quarter, allying fears of a bout of renewed economic malaise that had been fueled by a drop in GDP at the start of the year. The fresh data corroborate PMI surveys which had already been correctly indicating that the economy was faring well.
Reassuringly, the survey data show that the economy continued to grow at the start of the third quarter, albeit with some signs of momentum waning due to a sluggish export performance.
Problems with GDP
Accurately predicting Japanese GDP data is extremely difficult, more so than perhaps for any other major economy. Problems arise not because it's hard to know how the economy's performing, but because the initial estimates of the official data are notoriously unreliable, being prone to major revisions after initial estimates are first published.
For example, annual fourth quarter 2017 GDP growth has been revised up from a preliminary reading of 0.5% to 2.0%.
As noted in a recent paper by Nobuo Iizuka of Kanagawa University on revisions to Japan's GDP between 2002 and 2015, "the average of the absolute value of the revision range is 0.8 points on an annual basis. This is not a small revision range for the Japanese economy which suffers from a low growth rate around less than 1%".
There are also long-standing issues with the quality of the revised data. For example, Bank of Japan research questions the weakness of the GDP data in 2014, finding that tax revenue data are consistent with an economy that performed much better than the official economic growth estimates.
For investors seeking reliable up to date indications of the health of the economy, the PMI survey data, produced by IHS Markit on behalf of Nikkei, have provided valuable timely insights into the economy's performance and help to identify anomalies in the official GDP data.
Accurately tracking economic growth
We use three recent examples to highlight the value of the Nikkei PMI for tracking Japanese economic growth:
- Back on 5th January 2018, we noted that historical comparisons suggested the PMI survey data were consistent with the economy expanding robustly in the closing quarter of 2017, suggesting upside risks to many forecasts. The latest revisions show the economy having expanded at a 2.0% annual rate in the three months to December, some four times the originally estimated pace of growth.
- Whereas GDP data registered a 0.2% contraction of the economy in the first quarter of 2018, PMI survey data indicated that the underlying health of the economy remained in good shape to suggest that the quarterly drop in GDP looked like an anomaly and would therefore be reversed in the second quarter. Investors that focused purely on the GDP data and bet on a renewed downturn in the economy would have subsequently been wrong-footed as GDP rose in the second quarter.
- The latest official data showed the economy growing 0.5% in the second quarter, returning to health after the temporary drop in output signaled at the start of the year. The rise was broadly in line with the PMI survey composite output index, the average for which rose compared with the first quarter, and as anticipated in our commentary.
Over the past decade (for which PMI data for the service sector have also been available to complement the longer-running manufacturing PMI numbers), the surveys have exhibited a 73% correlation with GDP, acting with a 2-3 month lead on the official real GDP annual growth rate numbers in addition to simply being published earlier. The correlation rises to 78% in predicting nominal GDP growth rates in advance.
Slow start to third quarter
The faster updating of the monthly PMI data mean that we already have an indication of how the Japanese economy started the third quarter. The Nikkei Composite PMI Output Index dipped from 52.1 in June to 51.8 in July, representing the third-slowest rate of growth of business activity seen over the past ten months, and below the second quarter average of 52.3.
July saw manufacturing growth slow to a near one-year low as export sales failed to pick up following a downturn in June. Service sector growth also slowed slightly.
Preliminary ('flash') August PMI survey data for the manufacturing sector are published on 23rd August. Contact email@example.com for further information on receiving the PMI data.
Chris Williamson, Chief Business Economist, IHS
Tel: +44 207 260 2329
© 2018, IHS Markit Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited.
Purchasing Managers' Index™ (PMI™) data are compiled by IHS Markit for more than 40 economies worldwide. The monthly data are derived from surveys of senior executives at private sector companies, and are available only via subscription. The PMI dataset features a headline number, which indicates the overall health of an economy, and sub-indices, which provide insights into other key economic drivers such as GDP, inflation, exports, capacity utilization, employment and inventories. The PMI data are used by financial and corporate professionals to better understand where economies and markets are headed, and to uncover opportunities.
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