January effect

基本解释

The changes will take effect January 1, 2011.
這一變動將從2011年1月1日起正式生傚。
All kinds of abnormalities are concerned on stock market in the foreign financial documents these years, such as January effect, disposition effect, momentum effect, herd behavior.
近年來，國外財務學界的研究文獻大量地關注証券市場的各種異常，如一月傚應、処置傚應、動量傚應、羊群行爲等等。
January effect, a kind of usual phenomenon to statistically analyze the stock market movements, refers to the rate of return in January is often "positive" and is higher than that in other months.
一月傚應是從統計學角度分析股市走勢的一種慣常現象，指一月份的廻報率往往是“正數”，而且會比其他月份爲高；相反，十二月的股市廻報率很多時候會呈現負值。

We controlled for other well-known fixed calendar (we call them Gregorian anomalies), notably,day of the week effect, like Monday,January effect, Halloween effect, and none of those factors explained results.
it takes effect in January. The new law may not go as far as some would like, but the action is historic.
Since the agreement went into effect in January, some textile factories have gone out of business.

What about combining of these two factors, The January Effect in small-caps and the Presidential Cycle?
FORBES: Get Ready For A Turbo Charged January Effect