The y-axis tells the story. In 1928-29, the market lost about 45% of its value (375 down to 200). If the pattern holds, the current market will go from about 16

The y-axis tells the story. In 1928-29, the market lost about 45% of its value (375 down to 200). If the pattern holds, the current market will go from about 16400 to 12400, which is 25% of its value. That's still bad, but not as bad as 1928-1929.