It could be that people sold to make the most of the Capital Gains Tax Allowance last week (Β£6000) . In this new financial year it is only (Β£3000) some traders may have had enough. Next Year it is down to (Β£1500) Jeremy Hunt has killed the stock market.
There has been surveys over the last fifty years, and they have found that the stock markets performs better from September to April. Hence the saying, look it up for yourself.