contestada

Day 1 2 3 4 Advances 870 760 960 840 Declines 880 990 790 910 Volume advancing(m) 580 620 480 510 Volume declining(m) 670 580 720 520 Yield on top-rated corporate bonds 6.8 % 6.7 % 6.7 % 6.6 % Yield on intermediate-grade corporate bonds 7.4 % 7.4 % 7.5 % 7.6 % From day 1 to day 4, the confidence index has _____. This is _____.