F0203057\ Spread '01 (DVCS): The (□ smaller/ □ larger) the z-spread, the larger the effect on the bond price (i.e., the greater the credit spread sensitivity). The DVCS exhibits (□ convexity /□ concave).请问 the smaller the z-spread，the larger the effect，这部分答案不大能理解，希望老师给予解答。谢谢
