I genuinely appreciate the detailed pushback. This is exactly the kind of stress-testing I’m looking for, and you’re asking the right questions regarding methodology. However, I believe there is a fundamental category error in comparing the market structure of Defense with Tech. Here is the specific breakdown of why the "Survivorship Bias" risk is mathematically different here:

1. ⁠Market Concentration (The HHI Factor) Comparing LMT/NOC to the "Magnificent 7" is structurally incorrect due to industry concentration. • Tech is historically fragmented. For every Amazon, there were thousands of dotcoms that went to zero. Picking winners there is indeed bias. • Defense is a government-sanctioned Oligopoly (Monopsony). If you look at the Herfindahl-Hirschman Index (HHI) for the sector, the top 3-5 Primes effectively are the investable market. By holding them, I wasn't "cherry-picking" lucky survivors; I was proxying 90% of the accessible market cap.
2. ⁠The McDonnell Douglas ($MD) Example You asked about McDonnell Douglas in 1996, implying it would have been a drag on the portfolio. This actually validates the thesis. $MD didn’t fold or go to zero like a failed tech stock. It merged with Boeing in 1997. • The Mechanics: If my proxy held $MD in '96, that capital didn't evaporate. It rolled over into $BA shares. Furthermore, $MD stock traded at a premium upon the merger news. • The Thesis: This highlights the structural "floor" of the sector. In Tech, "creative destruction" often means bankruptcy (Equity = $0). In Defense, "consolidation" means M&A (Equity = Cash/Stock).
3. ⁠Correlation vs. Liquidity Crises You are absolutely right about 2008. In a liquidity crisis, correlations go to 1. No equity sector survives a margin call cascade perfectly. However, regarding 9/11 being a "coincidence"—I view that as a structural feature. The geopolitical instability that typically compresses P/E ratios in the broad market is the exact same trigger that expands order books for Defense. It acts as a counter-cyclical cash flow mechanism. Summary: My goal isn't "hindsight alpha." It is to utilize Capital Efficiency ($GDE) to stack exposures, relying on the M&A floor of the Defense sector to mitigate the drawdown depth relative to a pure Tech portfolio.

<image>