
Tim O'Brien
228 posts

Tim O'Brien
@OBrienTweets
Measuring the deflation curve of AI - https://t.co/Kmc7lv1AvB | Founder, Nine Island Advisory. Tweets span M&A, Venture, AI, Econ, Digital Health & The Mets



Sun Mar 15 | 4:00PM Update - Complexity Index (CI) • On Dec 16, 2025, the Complexity Index (CI) issued a signal, albeit unconfirmed, identifying elevated decline probabilities. CI is a regime risk indicator, not a precise crash timer. (See Critical Appraisal of the Complexity Index - link below). • On Jan 20, 2026, VIX spiked and the first structural break in SPX for 2026 occurred. CI is now a valid warning. • On Mar 6, a second structural break is identified as complexity (and VIX) continues to climb. (This sequence is labeled in the image below.) KEY POINTS 1. In major indices, higher "complexity" is derived from richer interactions, greater informational feedbacks, and amplification loops ... which, taken together, cause more frequent volatility spikes, structural breaks, and regime shifts. Empirical evidence finds complexity correlates with fragility. 2. "The Complexity Index sell signal functions as a regime risk indicator rather than a precise crash timer. Its predictive content manifests not as binary crash prediction but as systematic degradation of the forward return distribution: compressed expected returns, elevated decline probabilities, and collapsed risk-adjusted performance across all horizons from 20 to 90 days." Links Netlify Interactive: mellifluous-meerkat-77058c.netlify.app Critical Appraisal of a new index to anticipate a regime change: pbs.twimg.com/card_img/20324…











#Pittsburgh by the slice. Settle the debate. Best slice in the ’Burgh?












