Before revision:  These constraints are modeled by predictable convex-set-valued processes whose values do not necessarily contain the origin , i.e., it may be inadmissible for an investor to hold no risky investment at all.
After revision:  These constraints are modeled by predictable convex-set-valued processes whose values do not necessarily contain the origin ; that is, it may be inadmissible for an investor to hold no risky investment at all.