Grexit fears in Europe cause flight to safety By: CNBC.com News April 17, 2015 at 10:22 AM EDT Investors piled into safe harbors as fears rose over a Greek exit on Friday, sending bond yields tumbling. Read More >> Related Stocks: Adv Micro Devices American Express Anadarko Petroleum Bank of America BlackRock Cabot Oil & Gas General Electric Halliburton Co Honeywell International KeyCorp PNC Financial Services Schlumberger Ltd Seagate Technology Plc Sentinelone Inc Cl A Sherwin-Williams U.S. Bancorp