Look at the graph. Then answer the question.

1929 Drop in Stock Prices

A graph titled 1929 Drop in Stock Prices shows dates on the horizontal axis and numbers on the vertical axis. Prices were constant around 300 from January to May, increased from 300 in May to 375 in August, decreased from 375 in August to 250 in November, and remained constant from November to December.

Which statement best explains what happened in the stock market from August to the end of October?
The market increased its value.
The market lost much of its value.
The market totally collapsed.
The market slowly inched upward.