A bond portfolio named DEX, comprises four bonds (face value=$1000):

1. 50 semi-annual bond, 5-year maturity, a coupon rate of 4%.
2. 100 annual bonds, 30-year maturity, 8% coupon bond.
3. 150 zero coupon bonds, 10-year maturity.
4. 200 zero coupon bonds, 20-year maturity.

If required yield is 6% for all bonds per year, and

Bond 1 (semi-annual coupon bond):	23.19
Bond 2 (annual coupon bond):	212.40
Bond 3 (zero coupon bond):	98.97
Bond 4 (zero coupon bond):	107.00

Given DEX convexity, when the yield increases from 6% to 7%, the DEXs market value should fall by how much ($)?