How could the specific pairwise correlations help or hurt the overall portfolio risk?

Annualized Return Daily Standard Deviation Monthly Standard Deviation Annualized Standard Deviation Name Ticker VTSMX VGTSX VBMFX VIPSX Vanguard Total Stock Mkt Idx Inv VTSMX 0.88 -0.09 0.05 6.96% 1.26% 4.53% 15.69% Vanguard Total Intl Stock Index Inv VGTSX 0.88 0.02 0.17 4.05% 1.25% 5.06% 17.52% VBMFX -0.09 0.02 0.79 4.88% 0.25% 1.00% 3.45% Vanguard Total Bond Market Index Iny VIPSX 0.05 0.17 0.79 5.31% 0.36% 1.64% 5.68% Vanguard Inflation-Protected Secs Inv Annualized Return Daily Standard Deviation Monthly Standard Deviation Annualized Standard Deviation Name Ticker VTSMX VGTSX VBMFX VIPSX Vanguard Total Stock Mkt Idx Inv VTSMX 0.88 -0.09 0.05 6.96% 1.26% 4.53% 15.69% Vanguard Total Intl Stock Index Inv VGTSX 0.88 0.02 0.17 4.05% 1.25% 5.06% 17.52% VBMFX -0.09 0.02 0.79 4.88% 0.25% 1.00% 3.45% Vanguard Total Bond Market Index Iny VIPSX 0.05 0.17 0.79 5.31% 0.36% 1.64% 5.68% Vanguard Inflation-Protected Secs Inv