Stocks: Measuring the Monday Meltdown

The big losers -- and winners -- among key stocks, sectors, and markets on Oct. 6

Who were the big winners and losers -- stocks, sectors, and global markets alike -- in Oct. 6's dramatic stock market action? BusinessWeek's Tara Kalwarski gathered the details using data provided by Bloomberg Financial Markets.

S&P 500 companies that lost the most market capitalization on Oct. 6
Company Ticker Sector Current Market Cap Chg. (Mil. $) 10/6 Chg. (Mil. $) YTD
Microsoft Corp MSFT Technology 227,253 -13,056 -105,801
Bank of America Corp BAC Financial 146,927 -10,306 -36,198
JPMorgan Chase & Co JPM Financial 173,432 -7,489 26,810
AT&T Inc T Communications 158,286 -7,425 -93,765
Procter & Gamble Co PG Consumer Staples 205,732 -7,320 -22,284
Wal-Mart Stores Inc WMT Consumer Discretionary 227,777 -7,199 37,429
Oracle Corp ORCL Technology 93,966 -6,443 -21,673
Chevron Corp CVX Energy 157,866 -5,218 -39,195
Citigroup Inc C Financial 94,804 -5,119 -51,840
S&P 500 companies that gained the most in market capitalization on Oct. 6
Company Ticker Sector Current Market Cap Chg. (Mil. $) 10/6 Chg. (Mil. $) YTD
CME Group Inc CME Financial 22,032 2,267 -14,494
MetLife Inc MET Financial 32,481 1,605 -13,155
Hartford Financial Services Group Inc HIG Financial 9,310 1,055 -18,054
Mastercard Inc MA Consumer Staples 21,625 931 -6,726
Burlington Northern Santa Fe Corp BNI Industrial 29,268 582 84
PNC Financial Services Group Inc PNC Financial 26,126 433 3,771
Apple Inc AAPL Technology 86,408 416 -87,019
Apartment Investment & Management Co AIV Financial 2,997 346 -323
Norfolk Southern Corp NSC Industrial 21,375 300 1,522
Sara Lee Corp SLE Consumer Staples 9,572 268 -2,059
S&P 500 Sectors -- % Decline in Market Value
S&P 500 Sector Oct. 6 Year To Date
Utilities -5.3% -28.5%
Health Care -4.6% -19.3%
Telecommuniocations -4.6% -35.4%
Materials -4.4% -33.3%
Financial -4.2% -37.9%
Information Technology -4.0% -32.2%
Consumer Discretionary -3.6% -24.0%
Energy -3.6% -27.8%
Consumer Staples -3.4% -8.6%
Industrial -2.3% -31.9%
Biggest DJIA Losers -- Oct. 6
Company Ticker Sector Closing Price 10/6 % Chg. 10/6 % Chg. YTD
Bank of America Corp BAC Financial 32.22 -6.6% -21.9%
Alcoa Inc AA Basic Materials 18.11 -5.9% -50.5%
General Motors Corp GM Consumer Discretionary 8.48 -5.8% -65.9%
Merck & Co Inc/NJ MRK Consumer Staples 30.04 -5.5% -48.3%
Microsoft Corp MSFT Technology 24.89 -5.4% -30.1%
Boeing Co BA Industrial 51.00 -5.3% -41.7%
Citigroup Inc C Financial 17.41 -5.1% -40.9%
McDonald's Corp MCD Consumer Discretionary 57.15 -5.1% -3.0%
Walt Disney Co/The DIS Communications 28.04 -5.1% -13.1%
Hewlett-Packard Co HPQ Technology 40.95 -4.8% -18.9%
Biggest losses - world stock markets
    % Chg. 10/6 % Chg. YTD
Russian Federation RUSSIAN RTS INDEX $ -19.1% -62.2%
Denmark OMX COPENHAGEN 20 INDEX -11.1% -32.7%
Ireland IRISH OVERALL INDEX -9.9% -48.9%
Portugal PSI 20 INDEX -9.9% -46.7%
Norway OBX STOCK INDEX -9.7% -42.1%
Peru PERU LIMA GENERAL INDEX -9.3% -44.2%
Netherlands AEX-Index -9.1% -39.4%
France CAC 40 INDEX -9.0% -34.0%
Lithuania OMX VILNIUS INDEX -8.7% -43.8%
Turkey ISE NATIONAL 100 INDEX -8.6% -43.3%
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