The amount of overseas stocks traded by investors in South Korea reached an all-time high last month.

According to the Korea Securities Depository on Monday, the sum of foreign shares traded by domestic investors totaled nearly 56 trillion won, or 49-point-73 billion dollars, up 35 percent from January.

The latest monthly tally is the biggest since the agency began compiling related data in 2011.

Tesla topped the list of shares purchased at 344 million dollars, followed by the U.S. big data analytics company Palantir Technologies at 256 million dollars. The U.S. video game software developer Unity Software rounded out the top three at 230 million dollars.