The stock market had its sharpest drop in seven years on Friday amid fears the Federal Reserve may act aggressively to force the economy to cool down.

The Dow Jones Industrial Average fell by more than 660 points by the time it closed on Friday afternoon.

This fall marked the stock market's worst week in two years.

The last time the index shed this many points in a single day was on August 8, 2011. That time it happened because Standard & Poor downgraded the United States' dept from sterling AAA credit rating over partisan brinkmanship.

The stock market had its sharpest drop in seven years on Friday amid fears the Federal Reserve may act aggressively to force the economy to cool down

But, it came on the back of good news about the United Sates Economy.

The country saw a 200,000 job increase in January, and wages rose by 2.9 percent, according to the Post.

Wage increase is good news for workers - but can also be a sign that inflation might be coming.

That news sparked the drop - which started with a selloff in government bonds.

People started selling because they were worried the Federal Reserve might raise interest rates four times this year to combat potential inflation.

The central bank predicted the Fed would only have to raise it three times.

The Dow Jones Industrial Average fell by more than 660 points by the time it closed on Friday afternoon, according to the New York Post

That decision would come if the Federal Reserve decided to act rashly to cool down the economy because it is hearing up much more quickly than investors expected.

Increased interest rates make it more expensive for companies and individual to borrow money, and make the money borrowed more expensive.

Stocks then continued to fall throughout the day, hitting their lowest points around 3pm.

'We all know that many bull markets have ended by the Federal Reserve as they raise the rates to the point of slowing the economy down perhaps too much,' chief market strategist at Prudential Financial Quincy Krosby told the New York Post.

'It's come on quickly and it caught the market off guard.'