Russian President Dmitry Medvedev believes the Gulf of Mexico spill could lead to the "annihilation" of oil giant BP.
Henderson has walked away from a potential takeover of certain businesses of US group RidgeWorth Capital Management.
The spread on Spanish government bonds over German bunds reached an all-time high today on continued economic concerns for the Mediterranean country.
Henderson's Mark Harris removed UK and Europe equity index shorts across his three multi-manager funds over the past few days after gaining confidence of a market rebound.
Fears over Spain escalated yesterday as investors sold off government bonds on warnings of funding problems for the country's companies and banks.
Specialist funds vary in performance as small and niche groups contrast with biggest names in investment