I've been watching this for awhile now (as has rotor). I'm thinking that (someone, daboyz, algos, Russians, whoever) have a new signal/system which uses the GDX along with all types of miners as the signal. Once eveyone knows about the VIX or CP ratio "they" need a new signal system.
Watch and think. Just an opinion. Note how POT or Vale etc. tracks the GDX.
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