Answer:
47.72%; 22.72%
Explanation:
For Yahoo (YHOO),
Worth of shares:
= Price × Number of shares
= $30 × 210
= $6,300
For General Motors (GM),
Worth of shares:
= Price × Number of shares
= $30 × 100
= $3,000
For Standard and Poor's Index Fund (SPY),
Worth of shares:
= Price × Number of shares
= $130 × 30
= $3,900
Total worth of shares:
= YHOO + GM + SPY
= $6,300 + $3,000 + $3,900
= $13,200
Portfolio weight of YHOO:
= Worth of shares ÷ Total worth of shares
= $6,300 ÷ $13,200
= 0.4772 or 47.72%
Portfolio weight of GM:
= Worth of shares ÷ Total worth of shares
= $3,000 ÷ $13,200
= 0.2272 or 22.72%