May seems to be the best 5-th month for US markets for 9 years

You've probably heard the Wall Street rule - "Sell in May and relax." Well, it turns out that this rule does not apply, at least this year.
Indeed, US indices are moving to their best performance for nine years, after rising 2.8% since the beginning of the month. The blue chip index Dow Jones Industrial is also heading for its best performance since May 2009, according to FactSet.
In May 2009, the index added 5.3% to its value. Since the beginning of the fifth month of this year, the indicator has brought 4.1% return to investors.
The Nasdaq Composite Index is the best-performing US index this month, with a return of 5.2% since the beginning of the month. Better was its performance in May 2005, when it rose by 7.63%.
Investors' eyes will now be on trade data, US GDP growth, and employment and unemployment figures in the US for the past month, which will most likely predict the direction of the market next month.