European markets open sharply lower after the Greek people voted by a landslide to reject austerity measures demanded by creditors. The Chinese government moved to support stocks, to mixed effect.

When a trade like Monitise fails, I try to learn from the experience.

In highlights from his trading diary of the past week, Kass' also-ran 15 Surprises for 2015 includes bets that China growth will slow to under 5%.

In highlights from his trading diary of the past week, Doug Kass says the European Central Bank is jolting the markets and Monitise is looking more shaky.

In highlights from his trading diary of the past week, Doug Kass says the S&P 500 has topped out and explains why he sold Monitise shares.

Elon Musk will soon allow Dogecoin to purchase SpaceX merchandise.

The theme park company has opened Guardians of the Galaxy: Cosmic Rewind and not everyone is happy despite the ride getting wonderful reviews.

Aurora is slashing its production capacity as it builds a runway toward positive Ebitda a year from now.

Costco took in $984 million in new membership fee in its fiscal third quarter, helping the bulk retailer top Street forecasts for topline revenues.