What Manufacturing PMI Signals for Electronics Demand
There is a story in the relationship between manufacturing PMI and electronics demand. In our recent data, North American PCB book-to-bill moves alongside global manufacturing PMI. Electronic components respond later. A signal that provides advance notice in one market may describe conditions already unfolding in another.
What our numbers show
We compared global manufacturing PMI with the series behind our weekly charts, looking for the timing at which their movements aligned most closely.
Global semiconductors: The longer momentum comparison, covering 2005–2026, aligns most closely when PMI momentum leads semiconductor momentum by about two months. This is consistent with the two-to-four-month interpretation in our existing chart. The relationship weakens as the gap extends beyond roughly six months.
North American PCBs: Across 44 months from January 2023 through August 2026, PCB book-to-bill aligns most closely with PMI in the same month or about one month later. In this comparison, boards sit alongside manufacturing conditions as an early cycle indicator.
U.S. electronic components: The strongest relationship among the shorter comparisons occurs when PMI leads other electronic component book-to-bill by about three months. This category excludes semiconductors.
U.S. electrical equipment, appliances and components: This broader manufacturing category aligns most closely about five months later, with a weaker relationship. It adds evidence of a later response in electrical manufacturing, but it does not measure finished electronics OEM demand specifically.
Our interpretation is that manufacturing conditions and PCB activity provide early signals, with components responding later. This is consistent with different parts of manufacturing experiencing the cycle at different times. It does not establish that the same orders pass through these markets in a fixed sequence.
What the latest readings tell us
Global manufacturing PMI rose to 53.0 in September from 52.3 in August. North American PCB book-to-bill declined from 1.60 in May to 1.29 in August.
The PCB ratio still indicates bookings ahead of billings over its three-month window. August itself was weaker: bookings pulled back sharply after July’s surge, while year-to-date bookings remained 38.7% above the prior year.
We read this as an August interruption in strong order flow, with the next readings needed to establish whether it develops into a broader slowdown. September’s stronger PMI supports a favorable manufacturing backdrop, but the latest PCB observation covers August. The comparison is a reason to watch for confirmation, rather than declare a reversal.
Other electronic component book-to-bill held at 1.023 in August, essentially unchanged from July. Orders and shipments both increased modestly from the prior month.
U.S. other electronic component book-to-bill, three-month average. August 2026: 1.023. Original Custer chart; source: U.S. Census Bureau.
Taken together, these signals support our base case of continued, uneven improvement in electronics demand conditions. A sustained rebound in PCB bookings would strengthen that view. Further PCB weakness accompanied by softer component orders would challenge it.
How much weight the timing can bear
The semiconductor comparison has a much longer historical foundation than the recent PCB and Census series. The shorter histories capture roughly one downturn and recovery, so their timing should remain a working analytical guide.
Averaging also matters. The ratios use three-month calculations, and part of the apparent delay reflects how the indicators are constructed. The PCB publisher changed its survey methodology in May 2026, which limits comparisons with earlier periods.
These are meaningful directional relationships, but individual turning points can arrive in a different order. They offer context for planning rather than a dependable delivery schedule for future orders.
What decision makers can do with this
Watch the indicators relevant to your customers. A board manufacturer may experience changing conditions alongside PMI. A component supplier may see a later response. Company exposure matters more than assuming one timetable applies to the whole industry.
Use the timing to prepare. Improving manufacturing conditions justify reviewing inventory and capacity assumptions before demand becomes obvious in every market. Actual customer bookings should determine how far those plans advance.
Look for confirmation across readings.Greater agreement between PMI, PCB activity and component orders increases confidence in the outlook. When they diverge, investigate whether bookings, shipments or a particular customer market explains the gap.
The value of these comparisons is earlier recognition of a changing cycle. They help decision makers distinguish the first signs of improvement from the confirmation needed to commit resources.
Method: Timing observations are exploratory correlations in the supplied chart series. Positive lags represent PMI leading the comparison indicator. The short comparisons use PMI observations from July 2022 onward. The semiconductor comparison uses the 3/12 momentum operator: a three-month average divided by the average of the same months a year earlier.