What do we do with the oil service stocks now that peace seems to be breaking out in the Middle East, putting pressure on the price of crude? Today, SLB, the old Schlumberger, was in New York for an investor day meeting that was all about its digital business. These guys have incredible technology that helps oil and gas producers improve their performance. Now, it's still a real small part of their business, roughly 7% of revenue last year, but it's growing rapidly. It carries higher margins than the rest o ...