Value investor Duan Yongping posted on Xueqiu platform on September 15, reflecting on his investment in Occidental Petroleum (NYSE: OXY). He wrote that copying others' trades is difficult if one does not truly understand the stock. Duan noted that when OXY fell to around $40 recently, he did not dare to add positions, indicating he did not have a true understanding of the company. Today, he covered all his short call options and said 'I won't feel bad if the calls are exercised.'

The post has drawn attention from investors. Duan did not clarify whether he has fully exited or adjusted his position, but his wording suggests he no longer expects further upside at current levels. Duan has previously expressed bullish views on energy stocks and Berkshire Hathaway's investment logic in Occidental Petroleum.