its the investor/trader crowd behavior/psychology. its kind of a contrarian approach. When there is %90 bulls in the market - that is, the ones expecting a rise in the market, and obviously %10 of bears-those with negative expectations and expect the markets to fall, It generally happens to be the route which the %10 of the herd wants which is to the downwards.
Of course this is relatively speaking against other same times or periods in the past.
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Best
Market fluctuations over the short term are normal.
I am not sure what you are looking for.
The best question usually gets the best answer.
does anyone know reason ?