Stocks are wavering in morning trading, with the S&P 500 and Nasdaq Composite moving into positive territory. The Dow continues to mark one-day losses, down 0.3%, while the S&P 500 and the Nasdaq are up 0.1% each. More significant action is taking place in other markets like bonds, currencies and oil, which strategists say are all reacting to the fresh changes in the polling averages that favor a win by Vice President Kamala Harris.