Bullish Case: Helium's near-dated term structure shows market IV at 13.2% vs. Helium 8.8% in November, meaning puts are richly priced while the AI forecast is +1.0% bullish and bullish risk across tenors exceeds bearish risk by 31%. Both PDFs peak near $91-92, rate stabilization into 2027 supports agency MBS carry, and MBB has held a $89-93 range for two months despite $91.29 spot sitting -3.3% YoY.

Bearish Case: Term structure flattens by September 2027 (market 7.8% vs. Helium 7.0%), yet downside tails are fat: the Helium PDF assigns density well below $85 and the 50.8% IV on deep-OTM November puts signals crash-hedging demand. Put volume ran 258% above calls, MBB is -16.8% from its ten-year high, and SPY's surface shows equity downside vol skew that historically correlates with MBB drawdowns (SPY correlation -0.41).

Potential Outcomes:

1. Range continuation $89-$93 (45%): Flat term structure, both densities mode at $91-92; falsifiable if MBB closes outside the band two weeks running.
2. Rate-driven rally to $94-$96 (25%): Bullish tenor risk +31%, Helium forecast +1.0%; watch December FOMC.
3. Volatility shock below $88 (20%): Deep put IV 50.8%, put volume 258% above calls; December 18 expiry at-the-money puts already carry 10.4% IV.
4. Sustained grind to $85 (10%): Multi-year downtrend persists (-3.3% YoY).

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October 24, 2026