The dollar gained on Tuesday, taking its cue from higher U.S. Treasury yields as investors awaited minutes from the Federal Reserve's latest meeting for signals to the pace of interest rate hikes. SEE MORE Chinese independent, or teapot, refiners are bringing in rare cargoes of North American heavy crude in a new long-distance flow that traders say has only been made possible by OPEC's output cuts and ample supplies in Canada and the United States. SEE MORE Slowing global economic growth and mounting debt burdens in advanced and emerging economies alike are a hazardous backdrop for the alarming squeeze in global dollar supply, stemming from US trade protectionism and higher Federal Reserve’s interest rates. SEE MORE Leading iron ore companies in Australia and Brazil are working to increase output, and last year Brazil’s Vale (NYSE:VALE) produced a record 349 million tonnes of iron ore — above its own guidance, according to Reuters. The lift in India’s mining ban has also played an integral role in increasing iron ore output. SEE MORE One company having predicted this development early on is Global Energy Metals of Vancouver, Canada. Mitchell Smith, president and CEO of GEMC, explained these trends to Tech Metals Insider. SEE MORE