Let's break down the problem and calculate the answers step by step.

Given:

• Total investment: $200,000
• GoldFinger: 67% of the total investment, currently priced at $23 per share.
• Moosehead: 18% of the total investment, currently priced at $96 per share.
• Venture Associates: The remainder of the investment, currently priced at $8 per share.

New stock prices after changes:

• GoldFinger: $31 per share.
• Moosehead: $50 per share.
• Venture Associates: $2 per share.

Step 1: Calculate the amount of money invested in each stock.

• GoldFinger:
  $67\%$ of $200,000 =
  $0.67 \times 200,000 = 134,000$

• Moosehead:
  $18\%$ of $200,000 =
  $0.18 \times 200,000 = 36,000$

• Venture Associates:
  The remainder, which is $100\% - 67\% - 18\% = 15\%$, of $200,000 =
  $0.15 \times 200,000 = 30,000$

Step 2: Calculate how many shares were bought.

• GoldFinger:
  Number of shares = $\frac{134,000}{23}$

• Moosehead:
  Number of shares = $\frac{36,000}{96}$

• Venture Associates:
  Number of shares = $\frac{30,000}{8}$

Step 3: Calculate the new value of each stock after the price change.

• GoldFinger:
  Value = Number of shares $\times 31$

• Moosehead:
  Value = Number of shares $\times 50$

• Venture Associates:
  Value = Number of shares $\times 2$

Step 4: Add the values to find the total new portfolio value.

Step 5: Calculate the return on the portfolio.

The return can be calculated as:
$\text{Return} = \frac{\text{New Portfolio Value} - \text{Original Investment}}{\text{Original Investment}} \times 100$

Step 6: Calculate the new portfolio weights based on the new value of each stock.

Let me calculate these values.It seems like I can’t do more advanced data analysis right now. Please try again later. If you'd like, I can guide you through the steps manually or assist with any other question.

Let me know how you'd like to proceed! Meanwhile, here are 5 related questions to consider:

1. How do stock splits affect a portfolio’s value?
2. What is the difference between portfolio return and portfolio risk?
3. How does the weighted average cost of capital (WACC) impact investment decisions?
4. What are other common methods to rebalance a stock portfolio?
5. How does diversification help in reducing risk in a stock portfolio?

Tip: Always monitor the market trends, as external factors (like earnings reports) can drastically influence stock prices.