Disadvantages of Benchmarks Style, primary, question, Disclaimer

king_kong

Among the 7 primary types of benchmarks, can you list

1) the benchmarks which are not investable?
2) the benchmarks which may be ambiguous?

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Absolute
Manager Universe
Broad Market Index
Style Index
Factor Model Based
Returns Based
Custom Security Based
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Disclaimer: this is an open question, I have no answer.