单选题 An analyst does research about convexity. Which of the following statements is mo.st accurat.e to describe positive convexity when market yields decrease?
A. A bond experiences price increases.
B. A bond experiences diminishing price increases.
C. A bond experiences accelerating price increases.

【正确答案】 C

【答案解析】[解析] 正凸性是指市场利率下跌时债券价格上涨得快，市场利率上升时债券价格下跌得慢。负凸性是指市场利率下跌时债券价格上涨得慢，市场利率上升时债券价格下跌得快。题目中，正凸性体现在由于市场利率下跌，债券价格加速上升。