Overseas investors have scaled back their exposure to Samsung Electronics Co., the country\'s top market cap, this year as a series of patent rows cast clouds over the firm\'s earnings down the road, data showed Monday. Foreigners held a 47.34 percent stake in the world\'s top smartphone maker as of Friday, falling sharply from 50.45 percent tallied in the first trading session of 2013, the data from the bourse operator Korea Exchange (KRX) showed.