Every fund is one of three kinds, chosen once when it is created and never changed. The kind tells you exactly how much freedom the person running it has, and it is the first thing to look at.
Fixed
Never changes
Nobody can move anything. Not the creator, not Blendfi, not ever. The list picked on day one is the list on the last day. There is nothing to trust because there is no lever to pull.
Rule
Changes slowly
The manager can buy and sell what the fund already holds, freely, any amount, any time. A coin the fund does not already hold is the only thing on a leash: 24 hours of public warning, 3 new coins a month at most, and for its first 3 days only 10% of the fund's cash may follow it in.
At launch, no coin over 40%.
Flex
Changes freely
The manager can buy, sell and reshuffle anything the fund already holds, instantly, any amount, any time. A coin the fund does not already hold still waits 24 hours in public. After that, as many as they like, whenever they like.
The three types do not rank risk. They answer one question: who is allowed to touch what the fund holds. Fixed says nobody, Rule says the creator within a written leash, Flex says the creator, freely.
With Rule you are trusting the leash. With Flex you are trusting the person. With Fixed there is nobody to trust.