Answer:
57%
Step-by-step explanation:
The computation of one day rate of return on the index is given below:-
Index Value = Sum of (Outstanding Shares × Share Price)
Return = (Index Value Today - Index Value Yesterday) ÷ Index Value Yesterday
Index Value (Yesterday) = ($10 × 628,000) + ($15 × 519,000) + ($57 × 207,000)
= $6,280,000 + $7,785,000 + $11,799,000
= $25,864,000
Index Value (Today) = ($19 × 628,000) + ($27 × 519,000) + ($66 × 207,000)
= $11,932,000 + 14,013,000 + 13,662,000
= $39,607,000
One day rate of return on the index = Index Value (Today) - Index Value (Yesterday) ÷ Index Value (Yesterday)
= ($39,607,000 - $25,864,000) ÷ $25,864,000
= $14,743,000 ÷ $25,864,000
= 57%