Investment experts warn of risks in averaging down and short selling

Investment experts are highlighting the significant risks associated with aggressive trading strategies such as 'averaging down' (nanpin-gai) and short selling.

A case study of a 62-year-old retiree illustrates the dangers of averaging down. After receiving a 20 million yen retirement fund, the individual invested heavily in a growing restaurant chain. When the stock price dropped due to operational issues and increased competition, the investor doubled down on the position to lower the average purchase price, leading to substantial financial losses.

Complementing these warnings, a former Goldman Sachs trader emphasizes the necessity of rigorous risk management in short selling. The expert advises that investors should not rely solely on price fluctuations but must instead analyze the underlying news to determine if a decline is temporary or structural. To avoid infinite losses, traders are encouraged to limit short positions to the short-to-medium term and establish clear exit points rather than chasing market movements.