Stocks Robin Griffiths: Stocks likely to double dip after May Feb 23, 2010 Stocks could continue to push higher until May, but after that there is a serious risk of a double dip, Robin Griffiths, star technical strategist from Cazenove Capital, told CNBC. Source: CNBC, February 22, 2010. Did you enjoy this post? If so, click here to subscribe to updates to Investment Postcards from Cape Town by e-mail.