Wealthy investors plan to overhaul their investment portfolios regardless of who wins next week's US election, with a so-called Blue Wave most likely to spur savers to sit on higher amounts of cash.

According to a UBS survey of 1,000 US investors and business owners with at least $1m in investable assets or annual revenue, 63% have already made adjustments to their portfolios ahead of the 3 November vote, with just over a third increasing their cash positions.