Clean sweep by Democrats allows them to enact big-spending policies likely to benefit the economy, investors say. Global stock markets rose and bonds nursed losses on Thursday in anticipation of a big-borrowing and big-spending Democratic administration driving growth, following runoff elections that gave the party control of both houses of the United States Congress. On Wednesday, US Treasury bonds had suffered their steepest selloff in months after Democratic Party victories in two races in the state of Georgia handed them narrow control of the Senate and the power to pass their agenda. US S&P 500 futures rose 0.6 percent and Nasdaq 100 futures rose 0.9 percent as markets seemed to shake off a late fade that pulled Wall Street indexes back from fresh record peaks when chaotic protest...