I'm wondering if anyone has come across some unusual correlations in the market - something along the lines of - if sheep commodities increase in price, silver futures drop.
I made that up, but I want to see if there are any correlations that you've come across that at first glance seem very unlikely, but when looked at closely reveal that there is either a direct correlation (ie - up/up) or inverse correlation (down/up, or vice versa) over the course of hours/days/weeks.
I'm not looking for obvious things - such as wood futures going up affects lumber and sawmill co's., or when oil goes up, Exxon and Chevron go up - those are relatively easy to correlate, and with some timing can yield good results.
What I am looking for are stocks/options/crypto/commodities that would not have an immediately obvious correlation (inverse or direct), but somehow seem to affect one another.
Also, even if it *is* an unusual correlation, if you know *why* the securities act in tandem I'd really like to understand that as well.
If possible, please provide historical examples to back up your claim, otherwise it's just noise - ie, charts, figures over time.
Thanks!