Back in April, an office worker who preferred to be known only by her surname Ham, saw a screenshot uploaded on the internet by a person who claimed to have made a 4.6 billion won ($3.5 million) profit from an initial investment of 230 million won in EcoPro, a battery materials producer.
The share prices of food conglomerate Daesang Group have soared since Minister of Justice Han Dong-hoon and actor Lee Jung-jae had dinner together at a local restaurant in southern Seoul in late November.