There are eight types of real option, such as option of deferring investment, of periodical investment, of expanding, of shrinking, of ceasing, of abjuration, of conversion and of increasing of company.

• 实物期权可分成八种类型：延迟投资、分阶段投资、扩张、收缩、停启、放弃、转换和企业增长期权。