NO.PZ2016082404000036
问题如下:
How can a trader produce a short vega, long gamma position?
选项: Buy short-maturity options, sell long-maturity
options.
Buy long-maturity options, sell short-maturity options.
C.Buy and sell options of long maturity.
D.Buy and sell options of short maturity.
解释:
ANSWER: A
Long positions in options have positive gamma and vega. Gamma (or instability in delta) increases near maturity; vega decreases near maturity. So, to obtain positive gamma and negative vega, we need to buy short-maturity options and sell long-maturity options.
long gamma是不是可以认为增加gamma?short vega认为是降低vega?那short vega是不是也可以通过long short-term option 实现?