To find the net gain or loss for the week, we need to add up the daily changes in the stock's closing price:

1. Monday: Gained 8 points ($+8$)
2. Tuesday: Lost 6 points ($-6$)
3. Wednesday: Lost 1 point ($-1$)
4. Thursday: Gained 4 points ($+4$)
5. Friday: Lost 5 points ($-5$)

Now, sum all these changes:

$8 - 6 - 1 + 4 - 5 = 0$

The net gain or loss for the week is 0 points, meaning there was no net change in the stock's closing price for the week.

Would you like more details or have any other questions?

Here are 5 related questions to explore further:

1. What would the net change be if the stock had gained 3 more points on Friday?
2. If the stock gained 2 points every day of the week, what would the total gain be?
3. How much would the stock need to gain or lose on the following Monday to have a positive net gain for the two weeks combined?
4. If the stock starts the next week with a loss of 4 points on Monday, what would the cumulative change be including the previous week?
5. What was the average daily change in the stock’s price over the week?

Tip: Summing daily gains and losses over a period helps determine the overall trend and performance of a stock or any similar metric!