Global forces threaten corporate America By: CNBC.com News January 19, 2015 at 17:00 PM EST Investors must now answer a serious question plaguing the markets: How long can America continue to shine in a world hit by turmoil? Read More >> Related Stocks: Baker Hughes Inc Bank of America Citigroup General Electric Halliburton Co JPMorgan Chase & Co McDonald's Corp PNC Financial Services Sentinelone Inc Cl A Starbucks Corp