Consider: "Commodities are flashing a once-in-a-generation buy signal"

"Since the commodities supercycle unwound nearly 10 years ago, many investors have been waiting for the right conditions to trigger mean reversion and lift prices. I believe those conditions are either firmly in place right now or, at the very least, in their early stages."

http://www.mining.com/web/commodities-flashing-generation-buy-signal/