Wierd I know Bill but for 2 different reasons this what we could expect from an early black hole composed of negative matter*. Strange you would pick that example.

Missing matter estimates have been decreasing as time goes on lately.

*1 neg matter can push back on surrounding attracting mass. 2 An accretion disk would fade away with no incoming mass.

I can not visualize a Higgs field as a fluid nor can I mentally picture negative mass. It obviously does not interact with photons and other massless particles. This is what makes it a possible candidate for dark matter. It seems to me it only partially interacts with the gravity of our regular matter. In my thought experiment I keep going to 2 different forms of negative matter to explain dark energy. Literally, I got nutin.