Stock of the Day: Coinbase falls 10% on crypto-summit disappointment, S&P 500 snub

The move: Coinbase slumped as much as 10% on Monday, falling to $197.61 per share. The stock is now down 20% for the year. Why: Last week's White House Crypto Summit failed to shore up price support. The Friday event — attended by Coinbase CEO Brian Armstrong — gave investors no new policy support …