One thing you got right Andy is that we could discuss this forever and I wouldn't be able to convince you that today is Saturday if you won't admit it. There is an ancient Greek saying by the comedian Aristophanes about it. It translates roughly as: "You won't persuade me even if you convince me". So, as I end this thread (and my case) I give you this nice link:
https://sim02.simcountry.com/cgi-bin/cgiw?productsuppliers&miProduct=300&miSortOrder=1&miAmount=248570864935 In FB, today 14.12.2013, at top market price (741K per unit):
a. The biggest corp has a market value of ... 500B only.
b. Half the MBMU corps are LOSING, yes, LOSING money even at top price
c. The rest are just making a measly profit of 100M to 300M per month which will turn to BILLIONS of losses very soon, when the market turns SLIGHTLY downwards.
So maybe it's not my own incompetence in running my corps, heh? Maybe it's not "market price" or "optimising"?
Whatever... I just spend some GCs to turn them into HighTech Services or FMUs, right? That's the answer for everything it seems...