Here on Wall Street, the Dow Jones industrial average (^DJI) and the Standard & Poor's 500 index (^GPSC) start the week near the all-time highs set last week. Both gained more than 1 percent last week, as did the Nasdaq Composite (^IXIC).
The bond market is also drawing lots of attention. The yield, or interest rate, on the 10-year Treasury is above 3 percent -- the first time that's happened in more than two years.
Shares of Twitter (TWTR) have been on a roller coaster ride of late. They're up nearly 60 percent in the past month, but they plunged on Friday on fears that the stock rose too fast, too soon.
And finally, the drug maker Merck (MRK) is reportedly planning to overhaul its once-vaunted research and development operations. The Wall Street Journal says the company will establish four main innovation hubs around the globe -– near Boston, San Francisco, London and Shanghai. They would seek deals to license or acquire promising research done by others, while at the same time cutting back on the company's in-house research efforts.
-Produced by Drew Trachtenberg