Simon Derrick, chief currency strategist at Bank of New York Mellon in the U.K., also said he expects to see a weaker U.S. dollar, which will help boost gold prices.

FORBES: FOCUS: Markets More Focused On FOMC Than ECB

"Although the move to provide such guarantees is undoubtedly better than the highly destabilising alternative, this will raise questions about how these guarantees would be funded were they to be called upon, " said Simon Derrick from Bank of New York Mellon.

BBC: Bank uncertainty hits UK shares