Given the negative numbers:

You need to remember that negative numbers are those numbers less than zero. Therefore:

a. Given the phrase "-33 rushing yards in a football game", you know that the rushing yards are represented by a negative number and it is less than zero. Therefore, it indicates a loss.
b. Given the phrase "Stock market performance for the day: -125.68 points". You can also identify that it is less than zero, therefore, it lost -125.68 points.
Hence, the answers are:
a. Loss.
b. Loss.