Here's one of the better ones I've seen floating around here.
Special containment procedures: Item SCP-121 should always be kept within a lead-treated multi-polymer vial; this vial should be placed inside an industrial size autoclave. Great care should be taken to ensure the autoclave's integrity, two alternate power sources have been provided for it at its previous location (see USPGC, lower level).
Personnel requesting a sample from -121 should first be extensively vetted. If they pass muster, preparing a sample will require delaying the auotclave by two seconds, removing less than a milliliter of the liquid, and then running a second autoclave for two dyas to ensure the sample's integrity.
All personnel should observe full NBC precautions and report any and all "sudden revelations". Should a subject demonstrate sudden acumen regarding finance (and in particular, predictions towards commodities and stocks) he or she should immediately be detained.
Description: SCP-121 is 120 mL of a positron-heavy superconducting liquid, grey to silver in color. When ingested in combination with a cocktail of Piracetam, modafinil, and beta-blockers, it allows a short period of vivid precognition. First lifted from the Mandean temple of Alu-Shak in 1957, it has proved to be at once incredibly volatile and useful. Subjects ingesting more than 3 mLs of the liquid immediately display signs of intense and violent psychosis, developing into self-mutilation and culiminating ultimately in suicide.
Errata: for results from test subjects alpha through chi, see files 121?-121?.