These days, negative investment returns are expected and
(#~1=*) %1{::p. _90 30 40 20 10
1.05202
from the j-wiki financial phrases must be modified to allow these
negative returns:
(#~e.&(1,-1)@*)%1{::p._90 30 40 20 10
_0.512675 1.05202
leading to the problem of choosing the proper answer.
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