Why did so many people invest in the stock market 1920s

A lot of people invested in the stock market in the 1920s because they could buy stocks 'on the margin', and hence, required little initial capital. 'Buying on margin' means that you leverage an asset by borrowing money from a lender.

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44