How many per cent of all USD is held by the 900 richest people in USA?
The richest 1% (somewhere around 2 to 3 million people) hold 42% of the wealth in the USA. So should be somewhere around 10-20%.
Source? See this: Walmart Heirs Worth Same Amount As Bottom 40 Percent Of Americans In 2010
http://www.huffingtonpost.com/waltons-net-worth_n_1680642.html http://xkcd.com/980/huge/#x=-6432&y=-9056&z=2 has a good chart you can zoom around with.
the breakout is:
1.3% of the HOUSEHOLDS, 1.6 million, earn 20% of the money. $2 trillion dollars. ($400,000+ a year income)
08%, 09 million households, earn 20%... $2 trillion ($150,000-$400,000)
16%, 18 million households, earn 20%... $2 trillion ($90,000-$150,000)
23%, 27 million households, earn 20%... $2 trillion ($55,000-$90,000)
50%, 63 million households, earn 20%... $2 trillion (0-$55,000)
This is different than "are
worth same as 40%" or "hold X% of the wealth."
"the walmart heirs" constitute either 1 mega household (don't think so) or multiple households...