Last Week's Biggest Movers on Wall Street

"wall street" sign in focus ...

Plenty of stocks go up and down in any given week. The gainers inspire us to keep investing. The decliners keep greed in check while reminding us about the risks of the equity markets.

Let's go over some of last week's best and worst performers.

LifeLock (LOCK) -- Up 45 percent last week

The biggest winner on the New York Stock Exchange was LifeLock, moving higher after announcing solid growth in its latest quarter and a welcome settlement. The identity theft monitoring service provider reached a deal with the Federal Trade Commission and representatives of a class of consumers to settle accusations relating to its past marketing practices.

LifeLock also managed to close with more revenue and a higher subscriber count than it had three months earlier. That stretches the sequential growth streak on both of those metrics to an impressive 42 quarters.

Regis (RGS) -- Up 28 percent last week

%VIRTUAL-WSSCourseInline-1023%The hair salon operator and franchisor of Supercuts, MasterCuts and other retail brands didn't see its stock get snipped after posting healthy quarterly results. Regis posted better-than-expected bottom-line results, something that it hadn't done in more than a year.

Regis also delivered positive same-store sales during the quarter. That may not seem like such a big deal -- most of us need to get a hair cut -- but Regis actually posted negative comps for all of fiscal 2014 as well as fiscal 2015. It's a step in the right direction.

LendingTree (TREE) -- Up 24 percent last week

Another stock moving higher on encouraging financials was LendingTree. The online loan marketplace operator came through with record revenue and earnings. Most of LendingTree's growth came from its non-mortgage products, making LendingTree rely less on the cyclical whims of home loans.

Macrocure (MCUR) -- Down 61 percent last week

The market's biggest loser last week was Macrocure, a biotech targeting wounds. It got tripped up when its lead candidate failed to meet a late-stage clinical trial. Macrocure had a lot riding on CureXcell as a treatment for diabetic foot ulcers, but the test wasn't successful.

Rent-A-Center (RCII) -- Down 28 percent last week

We're not renting furniture, appliances, and other furnishings from Rent-A-Center the way we used to. The rental chain posted another decline in quarterly revenue at its namesake stores. It's faring better with its tech-centric Acceptance Now concept, but the retailer's still struggling.

Renta-A-Center also issued disappointing guidance, suggesting that things aren't going to get any better during the holiday quarter. KeyBanc went on to downgrade the stock.

GrubHub (GRUB) -- Down 23 percent last week

Another company following the same steps as Rent-A-Center in posting disappointing quarterly results and making matters worse with weak guidance was GrubHub. The restaurant delivery specialist was a hot IPO when it went public at $26 last year, but now it's trading below its initial price tag.

The concern here is that this is becoming a cutthroat niche. A lot of big and small players are starting to spring up, and they're offering great deals to get noticed. It's taking a toll on GrubHub. We know that because operating expenses are growing a lot faster than sales. That's enough to give investors a bout of indigestion.

Motley Fool contributor Rick Munarriz owns shares of LifeLock. The Motley Fool recommends LifeLock. Try any of our Foolish newsletter services free for 30 days. Check out our free report on one great stock to buy for 2015 and beyond.