The Great American Depression

We have heard so much about the Great Depression of the 30s. Let’s try to know what it meant in general.
The Great Depression of the late 1920s and ’30s remains the longest and most severe economic downturn in modern history. Lasting almost 10 years (from late 1929 until about 1939) and affecting nearly every country in the world, it was marked by steep declines in industrial production and in prices (deflation), mass unemployment, banking panics, and sharp increases in rates of poverty and homelessness. In the United States, where the effects of the depression were generally worst, between 1929 and 1933 industrial production fell nearly 47 percent, gross domestic product (GDP) declined by 30 percent, and unemployment reached more than 20 percent. By comparison, during the Great Recession of 2007–09, the second largest economic downturn in U.S. history, GDP declined by 4.3 percent, and unemployment reached slightly less than 10 percent.
There is no consensus among economists and historians regarding the exact causes of the Great Depression. However, many scholars agree that at least the following four factors played a role.

The stock market crash of 1929. During the 1920s the U.S. stock market underwent a historic expansion. As stock prices rose to unprecedented levels, investing in the stock market came to be seen as an easy way to make money, and even people of ordinary means used much of their disposable income or even mortgaged their homes to buy stock. By the end of the decade hundreds of millions of shares were being carried on margin, meaning that their purchase price was financed with loans to be repaid with profits generated from ever-increasing share prices. Once prices began their inevitable decline in October 1929, millions of overextended shareholders fell into a panic and rushed to liquidate their holdings, exacerbating the decline and engendering further panic. Between September and November, stock prices fell 33 percent. The result was a profound psychological shock and a loss of confidence in the economy among both consumers and businesses. Accordingly, consumer spending, especially on durable goods, and business investment were drastically curtailed, leading to reduced industrial output and job losses, which further reduced spending and
investment.