MAINT Fix a typo for March of 2008 in interesting periods.
MAINT Fix a typo for March of 2008 in interesting periods.

ChinaQuants/pyfolio,ChinaQuants/pyfolio,femtotrader/pyfolio,femtotrader/pyfolio,chayapan/pyfolio,quantopian/pyfolio,quantopian/pyfolio