Updated from 8:58 a.m. EST

Stocks in New York opened on the downside Monday, as investors took profits from the previous week's gains and major firms across sectors undertook restructuring measures amid a weakening economic environment.


Dow Jones Industrial Average

slid 213 points to 8616, and the

S&P 500

fell 24 points to 872. The


was lower by 42 at 1493.

At the end of an abbreviated session Friday, the major averages finished on the upside in light trading. Investors were monitoring the retailers as consumers flocked to stores to partake in "Black Friday" sales, which mark the beginning of the holiday shopping season. Today marks "Cyber Monday," when online retailers compete for Internet sales by offering steep discounts through their Web sites.

Last week, the S&P 500 rose 12%, while Nasdaq gained 11%.

Ahead of Monday's trading, beleaguered automaker

General Motors

(GM) - Get Report

was ironing out a plan to cajole Congress into giving it federal money, according to a report by

The Wall Street Journal

. The report indicated that GM's board is willing to explore all restructuring options, including a Chapter 11 bankruptcy filing, if it can't secure government funds.

Over the weekend, another report by the


said that GM was exploring other plans to shore up its balance sheet, including offering its debt holders the opportunity to swap credit for equity.

As the carmakers faced dire circumstances, the

United Auto Workers

called for Congressional aid for the Big Three.



also reported that

Delta Air Lines

(DAL) - Get Report

would scale back its orders for


(BA) - Get Report

new 787 Dreamliner and instead add to its orders for the long-range 777-200LR.

In the financial sector,


(C) - Get Report

bought a highway business from Spanish construction firm

Sacyr Vallehermoso

for $10 billion. Media reports also suggested Citi would sell its

Japanese trust banking unit

for $416.7 million.


Morgan Stanley

(MS) - Get Report

may buy regional banks to expand its retail banking footprint after becoming a bank holding company in September, according to a




(AIG) - Get Report

announced it was selling its Switzerland-based AIG Private Bank wealth management business to Abu Dhabi firm

Aabar Investments

Beyond the financial sector,

Johnson & Johnson

(JNJ) - Get Report

, meanwhile, said it would buy breast-implant maker



for $1.07 billion.

Looking at the day's economic data, the Census Bureau's October construction spending figures are due out, as is a read on November manufacturing from the Institute for Supply Management.

In the realm of commodities, crude oil for January delivery was down $3.68 to $50.75 a barrel. On Saturday,


said it will forgo new reductions in output but did not rule out a supply cutback going forward. Gold was down $36.10 to $782.90 an ounce.

Longer-dated U.S. Treasury securities were rising in price. The 10-year note was gaining 25/32 to yield 2.83%, and the 30-year was up 2 points, yielding 3.34%. The dollar was rising vs. the euro and pound but falling against the yen.

Overseas, European exchanges such as the FTSE in London and the DAX in Frankfurt were trading lower. In


, Japan's Nikkei closed with losses, while Hong Kong's Hang Seng ended on the upside.