What Are Filters?

Short answer: Filters are hard gates. A signal can be weak and you still look. A failed required filter means pass — the skill should not force a trade. In the Investor Skills schema a filter is required, disqualifier, or an expression like "< 0.5".

Examples

• Buffett: durableMoat: required, consistentFCF: required

• Universe liquidity: reject if you cannot exit

• Forensic skills: related-party webs as disqualifiers

Filters keep the model from “talking itself into” a name outside the investor’s rules. That is how a harness stays a judgment system instead of a chatbot.

Related: Signals · Universe · Investment schema

Nothing here is financial advice.