Answer:
2009, 2008
Step-by-step explanation:
Late 2007/Early 2008 is when the Great Recession hit the US due to factors like low-interest rates and credit fraud. The Great Recession lasted until 2009 when the US market was at its lowest value.
Changes in market indexes the market index reached its lowest point in the year 2009. based on the market index, demand began to fall sharply in the year 2008.