Bitcoin is back on a high. Photograph: KAREN BLEIER/AFP/Getty Images

Bitcoin traded above $11,000 for the first time in 15 months, recouping more than half of the parabolic increase that captured the attention of mains(...)

Tesla chief executive Elon Musk said short sellers were a source of “extreme torture”. Photograph: Brendan Smialowski/AFP/Getty Images

Tesla chief executive Elon Musk doesn’t like his critics. He has taken on analysts asking “boring, bonehead questions”, Reuters journalists (“relentle(...)

Former Enron chairman Kenneth Lay: short-sellers tend to get a bad press but their defenders point to their exposure of questionable practices at companies like Enron. Photograph: Dave Einsel/Getty Images

Short-sellers profit from market declines, something that has long ensured their unpopularity with politicians, regulators and chief executives. Napol(...)