base rate:
Severe economic crises triggering multiple extreme indicators simultaneously (unemployment >10%, S&P down >30%, housing down >10% YoY, deflation) have occurred roughly twice in 80 years (1929, 2008). 2020 was brief and didn't trigger housing declines. Base rate ~3-5% per 2-year window.
evidence updates:
Tariff risks push UP by ~3% (novel policy uncertainty). Elevated home equity buffers push DOWN by ~1%. Rising grocery prices push DOWN by ~1% (against deflation). Fed pause suggests no emergency but also no accommodation, roughly neutral. Net: slight upward adjustment from base rate.
combination method:
Single sub-question, weighted average at 100%
final:
The question requires an extraordinarily severe economic crisis - worse than a typical recession. While tariff risks are real, the multiple extreme thresholds (especially needing 3 of 5) make this a low-probability tail event. Estimate: 6%.