csc v1 高分补充练习题chp8-9

On Listed Equities Selling 

Minimum Credit Balance 

At $2.00 and over 

150% of market value 

At $1.50 to $1.99 

$3.00 per share 

At $0.25 to $1.49 

200% of market value 

Under $0.25 

100% of market plus $0.25 per share 

Securities eligible for reduced margin 

130% of market value 

是根据这个表格得出的百分比, 18题是根据sercurities eligible for reduced margin的百分比是130%, 只是答案解析中跳了很多个步骤, 而43题的价格超过$2，所以用的是150%
18题
minimum account balance  130%*22*1500 =42900
Less: proceeds from short sale. 22*1500=33000
Equals: minimum margin required 42900-33000=9900