For once it may not be wise to sell in May

"Sell in May and go away." Will this be the year that the old investment adage, arising from a long-run statistical underperformance of stocks from May to October versus the period from November to April, proves wrong?

via Business feed http://www.scmp.com/business/money/markets-investing/article/1241400/once-it-may-not-be-wise-sell-may