I would not completely exclude big tech. Hold a cap weighted index as the core position. Soften the tech concentration with value tilts. For the US stock sleev

I would not completely exclude big tech. Hold a cap weighted index as the core position. Soften the tech concentration with value tilts. For the US stock sleeve of your portfolio you might try 75% VTI #core position. cap weighted total US market 10% AVLV #tilt large cap value 15% AVUV #tilt small cap value No guarantees this outperforms 100% VTI, but it achieves the goal of softening the big tech concentration. Don't forget international. A good way reduce your big tech allocations 80% VEA #intl developed 20% VEXC #intl emerging, ex-China Put it all together with a 60/40 US/intl split VTI 45 AVLV 6 AVUV 9 VEA 32 VEXC 8 The blow of a SpaceX pump-n-dump is a drop in the ocean on this portfolio. In addition, only free float SpaceX shares will be bought by the index which is a fraction of all of SpaceX. Even a more concentrated S&P500 portfolio would not get hurt too much by the pump and dump.