For the sake of simplicity, let us assume that every year has 365 days. Also, let us assume that the probability of an up or down day is exactly 50%. (It isn't, but the average winner versus average loser removes the edge from that fact. These assumptions are just for ease of demonstration.)1st of sept. an up day for the indices 8 of the last ten.
For any one calendar date there is a 5.5% probability of having 8 or more up days for the last 10 years. If you analyze all 365 days, you should, on average, find about 20 that will give you such results for any 10 year period. This is completely due to randomness.
So be careful...
-Raystonn
