(Blockbuster article updated from Thursday)

DALLAS (

TheStreet

) --

Blockbuster

(BBI) - Get Report

is continuing on its tumultuous decline, after it reported on Thursday that fourth-quarter earnings came in significantly lower than expected due to weak holiday sales.

The company now expects a fourth-quarter loss between $183 million and $193 million.

CEO Jim Keyes said the company beefed up inventory and advertising during the quarter, but to no avail.

"In spite of these efforts, our performance during the holidays was well below expectations and anticipated adjusted EBITDA was affected, specifically in the month of December where as much as 30% of our full-year EBITDA has historically been generated," Keyes said in a statement.

Standard & Poors lowered its rating of Blockbuster on the news, moving the company to negative from stable.

Moody's Investor Services said on Friday that Blockbuster has enough liquidity to get them through the remainder of the year. But like S&P, Moody's does have concern over the company's long-term credit.

Shares of Blockbuster are tanking 7.2% to 45 cents in Friday trading. On Thursday the stock closed down 33% to 49 cents.

Blockbuster has faced increased competition from rivals like

Netflix

(NFLX) - Get Report

and

Coinstar

(CSTR) - Get Report

, and on Friday it will get a new competitor -

Google's

(GOOG) - Get Report

YouTube.

The online video site will begin offering movie rentals at the end of the week.

Blockbuster has been attempting to combat these pressures and plans to open as many as 10,000 DVD kiosks by the middle of the year.

Last week the company finally managed to

rid itself of debt

related to its former parent

Viacom

(VIA) - Get Report

.

-- Reported by Jeanine Poggi in New York.

Follow TheStreet.com on

Twitter

and become a fan on

Facebook.

Copyright 2009 TheStreet.com Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.