New common stock issuance usually sends a positive signal to the market and raises the common share price Ocauses the existing bondholders to raise their interest rates sends a negative signal to the market and lowers the common share price causes the existing bondholders to lower their interest rates causes the existing preferred shareholders to raise their preferred dividends A decrease in the nominal risk-free rate has which of the following effects? no effect on the WACC O a decrease in the WACC an unpredictable effect on the WACC an increase in the WACC an unknown effect on the WACC