There are 1,700 stocks in the Value Line index. How many covariances would have to be computed

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There are 1,700 stocks in the Value Line index. How many covariances would have to be computed to use the Markowitz full-covariance model? Use the data in Table for Problems

			Security				Covariances
	A	B	C	D		A	B	C	D
E( R)	14%	16%	12%	13%	A	0.766	0.315	0.236	0.249
2	0.766	0.735	0.563	0.353	B	0.315	0.735	0.27	0.285
	1.05	1.2	0.9	0.95	C	0.236	0.27	0.563	0.214
					D	0.249	0.285	0.214	0.353