In the first day of trading since a California jury handed Apple a $1.05 billion victory over Samsung, shares in the South Korean electronics manufacturer tumbled by about 7.5 percent to finish at their lowest close in a month. In a day of heavy trading, Samsung shed more than $12 billion in value as investors feared that the verdict would signal future troubles given that the company faces yet another patent lawsuit from Apple, one that targets its best-selling Galaxy S III. Despite the stock price drop, a number of investors believe the Korean company is on solid footing going forward.