No they're not, the link I provided also showed figures based on Forbes estimate of his net worth.
$40,000,000 (Trump's share of his father's fortune) invested in the market in 1974 would be worth $1.22 billion in 2015 (when he announced his campaign).
Compared to Forbes estimate of his net worth at $4.5 billion and Trump's own estimate of his net worth at $10.0 billion at the same date. Both beat the market handily and in fact Forbes could have overestimated his fortune by triple the amount and Trump would still be ahead.
> An intelligent, principled person
Again, I'm not talking about principled, I'm making the argument purely that Trump is intelligent. Not whether he is principled, or a good person, or a good businessman or even if he's a good president.
> He has no governing philosophy
I don't know about that. From what I can tell, he seems to consistently follow the same or similar playbook outlined in 'The Art of the Deal'.