19: Suppose we employ a "value-weighted" methodology to construct and track a two-stock index based on Stocks X and Y. Stock X has an initial price of $10 and there are 10 million shares outstanding. Stock Y has an initial price of $20 and there are 40 million shares outstanding. One month later, Stock X's price is $12 and Stock Y's price is still $20. The shares outstanding remain the same. What is the percentage change in our value-weighted index over the one-month period?

a. 0

b. 20.00%

c. 6.67%

d. 2.22%

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