Which of the following statement is correct?

		Systematic risk is a type of risks exist in a well-diversified portfolio
		If there is a high probability when x is really below expectation, y is also really below expectation, x and y should have negative covariance.
		The Federal Reserve increases interest rates 50 basis points is not a systematic-risk event
		Mad Cow disease in Montana hurts local ranchers and buyers of beef is a systematic-risk event