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

April 17

Weekly Loss

RadioShack (RSHCQ)

$1.41

31%

MoneyGram (MGI)

$14.81

16%

Travelzoo (TZOO -0.93%)

$17.35

15%

Himax (HIMX)

$9.12

13%

Barnes & Noble (BKS)

$16.37

10%

Source: Barron's.

Let's start with RadioShack. This company has been dealt a bad hand, and it may not even get a chance to play it. The struggling small-box retailer of mobile products and other consumer electronics plunged on reports that it's not seeing eye to eye with its creditors. The Wall Street Journal reports that RadioShack's lenders can't seem to agree on the right number of stores to close. It had announced plans to shutter as many as 1,100 of its 4,300 stores earlier this year. Some of its creditors think RadioShack should close nearly half of its stores, while others aren't on board with closing more than 200 locations. With losses mounting and comps continuing to plummet, this kind of impasse doesn't usually end very well.

Moneygram investors cashed out after a new rival entered its crowded realm of wire transfers. The world's largest retailer is introducing a low-cost Walmart-2-Walmart service that will allow customers to transfer as much as $900 through thousands of its discount department stores across the country.

Travelzoo shares were uncaged after posting disappointing quarterly results. The online provider of travel deals stumbled after missing Wall Street's profit target for the first time in more than a year. Folks still love bargains, but they're just taking up Travelzoo on its last-minute deals. Revenue slipped 5% during the quarter, fueled by a 12% plunge in North American revenue. 

Northland Capital Markets lowered its price target on Himax Technologies, concerned that the Taiwanese display specialist recently lost a major South Korean account. Analyst Tom Sepenzis is lowering his price target from $20 to $15. 

Finally we have Barnes & Noble giving investors paper cuts after chairman and founder Leonard Riggio unloaded some of his shares. Riggio's sale of 3.7 million shares still leaves him as the bookstore's largest shareholder with a 20% stake, but investors still don't like the transaction.