On this episode of Stock Movers:

Listen for comprehensive cross-platform coverage of the US market close as heard on Bloomberg Television, Bloomberg Radio, and YouTube with Bailey Lipshultz, Katie Greifeld, Carol Massar and Tim Stenovec.

- Boston Scientific (BSX) shares tumble as much as 11%, the most intraday since February 4, after results from the medical device maker’s trial of the Watchman heart implant fell short of investor expectations. Leerink Partners says the data is “not the home-run scenario” that bulls wanted.

- Alcoa (AA), Century Aluminum (CENX), and other mining stocks were jumping on Monday, after Iran targeted two major Middle Eastern aluminum producers over the weekend.Alcoa was up 10% to $64.31 in midday trading. Century Aluminum, jumped 7.7%, while Kaiser Aluminum was up 1.5%.

- Shares of Fannie Mae (FNMA) and Freddie Mac (FMCC) surged by more than 30% each on Monday after Bill Ackman called both stocks “stupidly cheap,” the billionaire’s latest bullish bet on the U.S.-controlled mortgage giants he’s lobbied to have relisted on the public markets, as the Trump administration considers plans.