What this driver is
AI capital spending covers the investment by the largest technology companies in the physical infrastructure needed to train and run AI models. That means data centres, chips, networking gear, power infrastructure, and cooling. The cycle is measured by the capital expenditure line in earnings filings and guidance calls for companies like Microsoft, Google, Amazon, and Meta.
When this driver is active, the engine has detected that the AI capex cycle is in an expansion phase. That means at least two of the major spenders have raised guidance, and the semiconductor supply chain companies are reporting order acceleration.
What activates it
The engine watches the semiconductor sector ETF (SMH) and NVIDIA (NVDA). When SMH is up meaningfully over the trailing five-day period and NVDA is confirming, the engine treats the AI capex cycle as active. That price signal is combined with macro event intelligence: earnings call guidance from hyperscalers and transcript analysis of what they said about spending plans.
What it connects to
When AI capital spending is expanding, it tends to flow into related themes:
- Semiconductors — logic chips, memory, and networking silicon
- Data centre power — electricity demand rising at scale, driving nuclear and grid infrastructure
- Cooling and server hardware — the physical layer of the data centre
- AI infrastructure software — orchestration, monitoring, model deployment
What to watch
The key risk to this driver is a guidance cut from one of the hyperscalers. If Microsoft, Google, or Amazon signals slower capex, the cycle could pause. Watch earnings calls from these companies closely. The next read comes with their quarterly results.
The engine also watches for semiconductor sector weakness. If SMH drops more than four percent over five days, it may begin tagging this driver as weakening even if the news narrative is still positive.
How Decifer tracks it
Decifer's live intelligence engine fetches prices for eleven real market symbols every cycle. SMH and NVDA are two of them. The five-day returns for these two instruments feed a set of deterministic rules. If both clear their thresholds, the AI capex growth driver activates. If either falls below, it deactivates.
Macro event intelligence adds a confirmation layer. When an earnings transcript contains guidance language about capital spending plans, that context reaches the engine and can support or contradict what the price signals are showing.