历史的表现不代表未来的走势，但我们就权当搞个封建迷信好伐？
Here is the average pre-holiday results for the last 50 years, based on the S&P 500 Index:
| Holiday | Buy two days before, sell at year end | Buy one day before, sell at year end | |||
| President's Day* | -0.1% | 12.2% | |||
| Good Friday | 7.3% | 17.8% | |||
| Memorial Day | -4.7% | 22.8% | |||
| Independence Day | 13.3% | 37.3% | |||
| Labor Day | 16.8% | 33.7% | |||
| Election Day | 17.9% | 4.6% | |||
| Thanksgiving | 4.3% | 1.1% | |||
| Christmas | -7.1% | 15.2% | |||
| New Year's | 31.1% | 19.6% |
http://stockcharts.com/school/doku.php?id=chart_school:trading_strategies:the_pre-holiday_effect
http://stockcharts.com/school/doku.php?id=chart_school:trading_strategies:the_pre-holiday_effect
