单选题 An analyst does research about diluted earnings per share and gathers the following information about a company:

Average market price per share of common stock during the year	$50
Year-end market price per share of common stock	$55
Exercise price per share for options on 50000 common shares	$60
Exercise price per share for warrants on 20000 common shares	$40

Using the treasury stock method, the number of incremental shares that should be used to compute diluted earnings per share is closest to:
A. 4000
B. 5455
C. 16000

【正确答案】 A

【答案解析】[解析] 股票期权和权证只有在它们的行权价格比当年股票的市场价格低的时候才有稀释作用。如果股票期权和权证有稀释作用，则利用库藏股票法(treasury stock method)来计算增加的股票数量。题目中，只有权证的价格低于股票当年的平均市场价格，即只有权证有稀释作用。
20000-$40×20000/$50=20000-16000=4000。