NEW YORK ( TheStreet) -- There is no shortage of black clouds over Wall Street this Monday morning, as Europe and corporate scandals ramp up the risk for investors.On the European front, a flight from Greek bonds Monday morning sent eurozone stocks crashing -- the Euro Stoxx 50 is down more than 2.5% as I write, and the French CAC 40 isn't far behind. Typically, massive selling across the pond leads to similar moves here at home, an ominous sign for Monday's trading session. At the same time, high-profile corporate flubs aren't exactly helping investor confidence right now. JPMorgan Chase's ( JPM) revelation that the firm's trading arm lost more than $2 billion due to sloppiness and poor risk management is still the news of the week. And it's apparently leading to the ouster of some of JPM's highest-ranking executives -- including the firm's chief investment officer. >>Also see: 5 Stock Trades for a Confusing Market On the other hand, Yahoo ( YHOO) CEO Scott Thompson stepped down over the padded resume that has been getting so much attention in the last week. That move clears the way for hedge fund manager Daniel Loeb to snatch a place on the board.