Why Genmab Stock Smashed It on Monday

On a generally upbeat Monday for the stock market, investors weren't only buying into U.S. companies. Quite a few of them also piled into the American Depositary Receipts (ADRs) of Danish biotech Genmab (GMAB 3.94%), on the back of encouraging news from the laboratory. Management's disclosure of the status of a shareholder-pleasing initiative also helped boost sentiment. The price of those ADRs rose by almost 4% as a result -- quite a distance higher than the S&P 500's (^GSPC 0.41%) 0.4% advance.Fresh news ...