Samsung Electronics Co. (005930) has recently experienced a $28-billion loss in a stretch of only six weeks, and the stock’s most accurate forecaster expects the drop to deepen as Apple Inc. (AAPL) and Chinese competitors bite off greater chinks of the market.

Samsung, which is based in Suwon, South Korea, saw its shares plummet 13 percent since 29th November, making it the quickest market-capitalisation losing company worldwide. According to Adnaan Ahmad, the Brerenberg analyst with the most accurate and best-returning forecasts over the last twelve months, the stock is set to decline another 11 percent.

The last quarter of 2013 marked the first quarterly decline for the word’s largest smartphone maker, ending a nine quarter stretch of increases, losing customers not only to Apple’s iPhones, but also to budget solution by Chinese makers. Despite bulls’ expectation for a rebound following the drop that brought the stock to its lowest level in three years, Ahmad anticipates more selling as Samsung’s profit margins shrink.