The neutral wire color is white in USA, Canada and other countries which run a 60 Hz electrical power service. The neutral wire color is blue in countries in Europe and eâ¦lsewhere which run a 50 Hz electrical power service.
Melpomenem/iStock/Getty Images. The Holding Period Return is an investment measure that calculates the return you have received on your investment over the length of time that you have held the investment.
The following charts show the average holding periods for various exchanges over the years: Click to enlarge. Source: Patience and Finance, Andrew G Haldane, The Bank of England. Based on the NYSE index data, the mean duration of holding period by US investors was around 7 years in 1940. This stayed the same for the next 35 years. The average holding period had fallen to under 2 years by the time of the 1987 crash. By the turn of the century it had fallen to below one year.