RETAIL INVESTORS SHOULD TREAD CAREFULLYWhile institutional investors may be buying SK Hynix’s shares at their own risk, billionaire Chey does have millions of small investors to answer to, especially in a society that prizes egalitarian values.Throughout this year, mom-and-pop traders have bought the stock, filling the void left by global asset managers selling into the rally. Wanting to amplify their returns, many purchased leveraged exchange-traded funds that were launched in late May.These retail investors have already been penalised as SK Hynix’s Seoul-listed shares have whipsawed in recent weeks, creating losses due to a phenomenon known as volatility decay. If SK Hynix can’t continue to deliver outsized profits and retail investors’…