There's never a shortage of losers in the stock market. Let's take a closer look at five of this past week's biggest sinkers.

Company

Dec. 27

Weekly Loss

Textura (NYSE: TXTR)

$29.54

28%

Tesaro (NASDAQ: TSRO)

$28.00

26%

Shiloh Industries (SHLO)

$19.61

16%

Steiner Leisure (STNR)

$48.25

14%

Tower Semiconductor (TSEM -1.39%)

$5.82

10%

Source: Barron's.

Let's start with Textura. The provider of cloud-based enterprise software solutions for the construction industry took a hit after being marked down by noted worrywart Citron Research. The report claims that Textura's business isn't as successful as the market seems to think, and it calls into question the past of its executives.

Tesaro stock plunged after a potential treatment to prevent chemotherapy-induced nausea and vomiting, or CINV, failed to show statistical significance in any of its secondary end points. 

Shiloh Industries moved higher a week earlier, when it posted quarterly results, but this past week it gave back all of those gains. It was a strong report out of the provider of lightweighting solutions for the automotive industry. Revenue climbed 39% and earnings climbed even higher. However, after several quarters of blowing past analyst profit targets, Shiloh merely met expectations this time. 

Steiner Leisure hit rough waters when the operator of cruise-ship spas failed to gain a contract renewal out of Celebrity Cruises. Steiner was surprised by the move, especially since it claimed that it was serving up record results on Celebrity's ships. The move is expected to cost Steiner $0.24 a share in earnings.

Finally we have Tower Semiconductor sliding. The stock is merely giving back gains after soaring during the prior week on news that it was buying Panasonic's chip foundries business. It was a smart and timely purchase, but a little profit-taking after seeing the stock climb by better than 50% on Friday of the previous week isn't a surprise.