In the S&P 500, a few stocks made significant moves this past week, and with some on exponential volume spikes as well. 24/7 Wall St. has tracked five of the unusual stock movers over the past week to see if investors should keep their eyes open for opportunities in the coming week.

Williams Companies Inc. (NYSE: WMB) saw its shares jump this past week on news that it rejected an all-equity buyout bid from Energy Transfer Equity valued at $53 billion, or $64 per share. Shares increased 18.8% from the end of the previous week and closed at $57.12 on Friday. The stock has a consensus analyst price target of $59.90 and a 52-week trading range of $40.07 to $61.38.

HCA Holdings Inc. (NYSE: HCA) has been the long drawn out story of the Affordable Care Act (ACA). This week the Supreme Court handed down a ruling that subsidies under the ACA were in fact legal. Other hospital stocks jumped at the news, but HCA was the highest over the week. Shares gained 9.1% from the end of last week and were trading at $92.10 on Friday’s close. The consensus analyst price target is $92.95, and the 52-week range is $53.61 to $91.84.

ALSO READ: 4 Stocks to Buy With Potentially Big Upcoming Catalysts

Cigna Corp. (NYSE: CI) has benefited from the merger talks that happening within the health insurance industry. Aetna, UnitedHealth and Anthem have all benefited as well, and investors have been generous pricing in these merger talks over the past month. Over the course of the past week, Cigna shares increased 8.1% and were at $168.06 as Friday’s trading session came concluded. That was within the 52-week trading range of $85.75 to $170.63. The stock has a consensus price target of $156.15.

Lennar Corp. (NYSE: LEN) saw its shares steadily gain over the course of the week. Housing data earlier in the week suggest that homebuilding stocks had a very strong May. Later on, Lennar reported earnings with a strong beat. Over the past week, shares increased 6.2% to end at $51.98 on Friday. The stock has a consensus analyst price target of $52.82 and a 52-week trading range of $35.74 to $53.67.

Facebook Inc. (NASDAQ: FB) had a couple factors that affected its gains over the past week, which valued its market cap over that of Wal-Mart. The social media giant really just made a steady push over the course of the week as it plans to further monetize its platforms of Instagram and Facebook with mobile video ads. During the week, shares increased 6.2% to $88.01 on Friday’s close, within a 52-week range of $62.21 to $89.40. The consensus price target is $97.17.

ALSO READ: Oil Analyst Picks 3 Top Stocks to Buy for the Rest of 2015

Thank you for reading! Have some feedback for us?
Contact the 24/7 Wall St. editorial team.