Hints and tips:
...Columbia Business School assistant professor Enrichetta Ravina tells the FT's John Authers that the rich are more disciplined in the way they diversify their investments, rebalance their stock portfolios...
...That is the message from a study of the portfolios of 115 wealthy US households, with an average net worth of $90m, from 2000 to 2009, carried out by a group of academics including Enrichetta Ravina of Columbia...
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