* U.S. stock futures fall 0.4% on France lockdown report * Euro zone shares futures down 1.3%, FTSE futures down 0.5% * Caution grows over Biden victory bet in U.S. election * Wall St volatility index at highest in nearly 2 months TOKYO, Oct 28 (Reuters) - Global shares slipped on Wednesday as coronavirus infections grew at an alarming pace in the United States and Europe, while uncertainty over next week’s U.S. elections added to a “risk off” tone. European shares look set to tumble amid reports of potential lockdowns in Germany and France, with Euro Stoxx 50 futures down 1.3% at five-month lows. FTSE futures were down 0.5% to hit lows last seen in mid-May. Futures for U.S. S&P500, Dow Jones and Nasdaq all fell 0.2-0.4%, rattled by a media report that French government may bring in a national lockdown from midnight on Thursday. German newspaper Bild, meanwhile, reported that Chancellor Angela Merkel wants to close all restaurants and bars and some other venues from Nov. 4 in a bid to curb new infections.