vacillate
verb [ I ]
uk/ˈvæsɪleɪt/ us FINANCE
if prices, rates, etc. vacillate, they keep rising and falling by small amounts:
After weeks of vacillating around $75 per barrel, the price of crude closed at $85 barrel.
to be uncertain about what to do or to keep changing your opinion about something:
vacillate between sth (and sth) The election result was in the hands of voters vacillating between two parties.