Many investors hang on to Johnson & Johnson shares for the same reason they stock their cabinets with the company’s Band-Aids and baby shampoo: comfort and safety. Johnson & Johnson offers a diverse business mix, including pharmaceuticals, medical devices, and consumer products; a $40 billion cash kitty; and steady, mid-single-digit earnings growth. Add a dividend yield near 3%, and the stock soothes many a portfolio, especially when markets are roiled.J&J’s shares (ticker: JNJ) are up 8% this year, to a...