Bullish Case: PCAR at $106.96 has collapsed -17.2% in sixty days despite genuinely strong fundamentals: 2026 Class 8 orders +95% YoY, Denton hiring +1,000, a 25% truck tariff wall protecting domestic OEM margins, and Trump's tariff/EPA-rollback tailwinds. Helium's density concentrates mass at $110 (0.194) with a +3.34% model tilt and bullish risk 21% above bearish. Calls traded 72% more volume than puts. Helium's term structure (17.2% Nov rising to ~24.5% mid-2027) sits far below market's ~30% across all tenors, implying the market overprices downside; mean reversion plus tariff-protected demand supports recovery toward $112–$118.

Bearish Case: The -17.2% two-month drawdown broke every prior support thesis and reflects a real de-rating: truck orders may be pull-forward from pre-buying ahead of 2027 NOx rules, not durable demand. Market IV stays ~30% at all tenors versus Helium's 17–24%, and both density surfaces show heavier left tails than Helium's narrow $110 peak. EPS/margin risk from EPA compliance costs, freight softness in BLS data (manufacturing jobs -35,000), and post-earnings distribution could push $100–$104 before any bounce.

Potential Outcomes:

1. 38%: Recovery $112–$118 by Jan 2027 — order strength + tariff protection; falsified below $104.
2. 27%: Range $105–$112 chop; IV compression stalls near $112 (the Helium $110 mode).
3. 22%: Slide to $100–$105 on NOx pre-buy unwind/margin worries; monitor Jan 15 98.6P OI.
4. 13%: Below $100 macro/freight shock (SPY left-tail IV transmits).

October 24, 2026