BUY DAL OPTION Price target $54 Price target 2 57.68 Warren Buffett famously advises investors to "be fearful when others are greedy, and be greedy when others are fearful." The billionaire investor's Berkshire Hathaway conglomerate showcased that approach last week: It boosted its stake in Delta Air Lines during the massive market selloff fueled by coronavirus fears. Berkshire deployed about $45 million to buy nearly 980,000 shares in the airline last Thursday, according to a Securities and Exchange Commission filing. The purchases raised its total holding to about 71.9 million shares, giving it an 11.2% stake in the company.