The current record-holder for melting point is tantalum hafnium carbide (Ta4HfC5), a refractory compound with a melting point of 4215 Â°C In other words, you could not heat a rock that high because there's not a furnace or a crucible on earth that could hold it.
DEFINITION of 'Trade Surplus'. An economic measure of a positive balance of trade, where a country's exports exceeds its imports. A trade surplus represents a net inflow of domestic currency from foreign markets, and is the opposite of a trade deficit, which would represent a net outflow. Next Up.
Updated February 16, 2016. Definition: The balance of trade compares the value of a country's exports of goods and services against its imports. When exports are greater than imports, that's a trade surplus. Most nations view that as a favorable trade balance. The opposite, when the value of imports outweighs the value of exports, is a trade deficit. They usually regard it as an unfavorable trade balance. A favorable trade balance depends on three factors. First, is where the country is in its business cycle.