As the rally in global equity markets continues – with the S&P 500 closing at a fresh high on Wednesday - Rosenblatt Securities' Brian Reynolds warned that the index is still some way off the 2,500 level.

"We've pointed out that the credit market has been acting as if the S&P is already well over 2,500, but the stock market takes longer to get where it's going than the credit market does; this is because the equity market has traders who are trained to sell overbought rallies and buy oversold dips, unlike credit," he said in a research note.