NO.PZ2024061801000103
问题如下：
A trader sells short 1,000 shares of Stock A, which is currently trading at $40 per share. A margin requirement of 140% applies as well as a maintenance margin of 125%. If the share price rises to $55, the amount of the margin call is closest to:
选项：
A.$0.
B.$1,000.
C.$13,000.
D.$15,000.
解释：
C 做空1,000股交易价格为$40的A股票产生$40,000。基于140%的保证金要求，需要追加$16,000的保证金（= 40% × $40,000），总计$56,000。如果股票价格上涨到$55，那么做空的股票价值为$55,000，维持保证金变为$68,750（= 1.25 × $55,000）。初始保证金$56,000不足以覆盖维持保证金，这意味着有$12,750的追加保证金要求（= $68,750 – $56,000）。
NO.PZ2024061801000103
问题如下：
A trader sells short 1,000 shares of Stock A, which is currently trading at $40 per share. A margin requirement of 140% applies as well as a maintenance margin of 125%. If the share price rises to $55, the amount of the margin call is closest to:
选项：
A.
$0.
B.
$1,000.
C.
$13,000.
D.
$15,000.
解释：
C 做空1,000股交易价格为$40的A股票产生$40,000。基于140%的保证金要求，需要追加$16,000的保证金（= 40% × $40,000），总计$56,000。如果股票价格上涨到$55，那么做空的股票价值为$55,000，维持保证金变为$68,750（= 1.25 × $55,000）。初始保证金$56,000不足以覆盖维持保证金，这意味着有$12,750的追加保证金要求（= $68,750 – $56,000）。
老师好，从解析看，维持保证金跟随股价的变化而变动，初始保证金不变，是这样理解不。之前一直以为都是固定的数值。
