Why did the stock market change course SO SUDDENLY on the first few days of February 2018?

It was skyrocketing through most of January, fell off a small cliff the first week in February, and has been bouncing sideways since then? In retrospect, what happened on the first few days of February that caused a selloff and standoff? Is it all about interest rate worry, or something else, or just a random... show more It was skyrocketing through most of January, fell off a small cliff the first week in February, and has been bouncing sideways since then?

In retrospect, what happened on the first few days of February that caused a selloff and standoff?

Is it all about interest rate worry, or something else, or just a random fluke?

thanks for your anwers
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