This might be important.
Four stories via Mining.com:
February 13: "Iron ore price drops on Chinese demand fears"
February 14: "Column: Shanghai metal stocks dent great expectations"
February 15: "China thermal coal hits one-year low on slow industrial recovery"
February 15: "Weak Chinese demand pushes aluminum price to five-week low"
Bringing to mind the comment of the best equity analyst I've ever known when I showed him the chart of a stock that was pretty much a straight line up from bottom left to top right, for 25 years:
"A trend appears to be emerging".
