type: framework-update tags: [cyclical, semiconductor, multi-year-cagr, base-effect, recovery, growth-decomposition, structural-vs-cyclical] confidence: medium created: 2026-04-30 source: SIMO stock-analysis 2026-04 persona: gaucho source_analysis_path: skills/gaucho/analyses/SIMO/SIMO_stock-analysis_2026-04.md source_paragraph_quote: | Revenue growth ≥30% YoY | PASS (with caveat) | +105% Q1, +102% Q2 guide. But comp is FY25 trough ($166.5M Q1). Multi-year CAGR Q1FY22→Q1FY26 is ~9% — the 105% is partly base-effect. source_transcript_span: null source_loss_log_path: null

Multi-Year CAGR as the Truth-Anchor When Cyclical Recovery Flatters Both YoY and QoQ

When a historically cyclical company (semis, memory, materials, energy, shipping) reports explosive YoY and QoQ growth out of a cycle trough, both numbers are simultaneously flattered by the trough comp. The existing yoy-vs-qoq diagnostic fails here because both are inflated. The truth-anchor is the multi-year CAGR computed peak-to-current (or peak-to-peak), which removes the trough-base distortion and reveals the underlying structural growth rate. Before sizing on a cyclical post-trough print, compute the multi-year CAGR and treat the gap between headline YoY and multi-year CAGR as the cyclical-tailwind contribution.

Evidence

SIMO Q1 FY26 (2026-04): +105.5% YoY, +22.9% QoQ — both look spectacular. But Q1 FY22 was $252M and Q1 FY26 is $342M, a 4-year CAGR of only ~9%. The headline 105% YoY is ~80% trough-base flattery + ~20% structural progress. Sizing decision was bounded to Tier 2 (4-6% initial) explicitly because the multi-year CAGR contradicted the headline.
Complements existing cyclical-trough-depth-test-structural-transformation-validator.md (forward-looking validator) and yoy-base-effect-flattery-qoq-stall-signal.md (which only fires when QoQ is flat). Neither catches the high-YoY-AND-high-QoQ-from-trough case.

Implication

When analysing a cyclical company printing high YoY and high QoQ:

Locate the cycle peak in the 16-Q dataset (the highest revenue quarter prior to the trough).
Compute peak-to-current CAGR over the spanned period (3-4 years typically).
If the multi-year CAGR is below the company's stated structural growth target (e.g., 9% vs. claimed 20%+ structural rate), treat the gap as cyclical-tailwind and size accordingly.
Discount headline YoY by (1 − multi-year-CAGR / headline-YoY) as the cyclical share to fade for sizing purposes.
Pair with the next-cycle trough-depth test for forward validation: backward CAGR diagnoses the present, forward trough-depth confirms structure has actually changed.

This is a discipline tool that prevents oversizing on post-trough recovery quarters that screen identical to genuine reacceleration in non-cyclical compounders. The same +105% YoY in a SaaS compounder with a 35% multi-year CAGR is structural; in a semi with a 9% multi-year CAGR it is mostly the cycle.