Bitcoin is a virtual or online currency created through a "mining" process where a computer's resources are used to perform millions of calculations. Once mined, bitcoins can be stored in an online wallet, traded in an online exchange, or used to buy goods and services.
Business is so tough for oilfield giants Schlumberger NV and Halliburton Co that they have come up with a new sales pitch for crude producers halting work in the worst downturn in years. It amounts to this: "frack now and pay later."
Crude oil prices ended their worst month since the 2008 financial crisis after 3 events in a row knocked oil and other commodities for a loop. Those three events in order are Greece, Iran and China; and while I guess you can't call them "black swan" events, the timing of all three colliding at the same time led to the oil markets July swan song.