This is computed for each system or investment being compared over the same period long enough to include significant "ups" and "downs". A suitable period is something like the last 5 to 20 years.
Keep re-saleability in mind when you make a purchase; TIPS: 'Too many motorists think with their eyes rather than their heads and find out they have bought the wrong new car only when they come to sell it'.(Motoring)
Feb 19, 2002; WITH thousands of motorists looking forward to taking delivery of a new car in March when the new 02 registration kicks in,...