Quote from teun:
You also have to consider the currency which he used to invest.
When this currency dropped (in the mentioned period) by, say, a factor 10 compared to the other major currencies, his results are more obvious.
Same as what happens with the DOW nowadays, it is not strange that it breaks new records because the profits of US companies increase because of the weak $.
In other currencies (euro) the DOW is flat for the last 5 years.....
