Markets were falling sharply Monday, March 19, as Facebook Inc. (FB - Get Report) led the tech sector lower. 

The Nasdaq had its worst day of trading in nearly 2 months, though the major markets were able to close off of session lows on a dismal day of trading.

The Dow Jones Industrial Average fell 1.34%, or 336 points, to 24,611 while the Nasdaq dropped 1.84%, or 138 points to 7,344 and the S&P 500 fell 1.42%, or 39 points, to 2,713.

These stocks were the biggest decliners on the three benchmark indexes. 

Dow Decliners

Cisco Systems Inc. (CSCO - Get Report) - shares fell 1.64% to $44.27 on no new news affecting the company directly. Despite the decline, trading volume was less than half of its daily average with about three hours left in trading. 

DowDuPont Inc. (DWDP) - shares closed down 2.05%, also on weak volume. It was reported over the weekend that outgoing Chairman Andrew Liveris nearly tripled his compensation last year to $65.7 million. 

3M Co.  (MMM - Get Report) - shares closed down 2.37% to $231.60. 

Goldman Sachs Group Inc. (GS - Get Report) - shares fell 1.9% to $262.54 after analysts at Credit Suisse named rival JPMorgan Chase & Co  (JPM - Get Report) as the investment bank best positioned to benefit from the coming bank-friendly trading environment. 

Caterpillar Inc. (CAT - Get Report) - shares were down 2.74% to $152.18 after the company announced plans to close facilities in Texas and Panama while also considering closing a plant in Illinois. 

Nasdaq's Top Fallers

Facebook Inc. (FB - Get Report) - shares fell down 6.77% due to the fallout from a scandal in which the company didn't disclose that the personal information fro 50 million accounts had been improperly accessed by a political group looking to sway votes in the 2016 U.S. presidential election as well as the U.K.'s Brexit vote.

Apple Inc.  (AAPL - Get Report) - shares were down 1.53% to $175.30 after analysts at Nomura lowered their second-quarter iPhone X sales projections to between 8 million and 12 million from their previous view between 13 million and 18 million. 

Nvidia Corp. (NVDA - Get Report) - shares closed down 3.78% to $241 after analysts at RBC Capital said that the boon the company has experienced thanks to crypto mining chips is coming to an end as crypto mining becomes less profitable. 

Baidu Inc. (BIDU - Get Report) - shares of the Chinese e-commerce giant declined 3.64% to $252.83 after the company's video streaming unit, iQiyi, launched its $2.4 billion initial public offering on the Nasdaq. The company plans to offer 125 million shares priced between $17 and $19 each.

Mattel Inc. (MAT - Get Report) - shares fell 4.62% to $13.22 as the company continues to suffer from the fallout of the demise of leading retail partner Toys "R" Us. 

S&P 500 Suckers 

Alphabet Inc. (GOOGL - Get Report) - shares dropped 3.03% as the company got swept up in the furor over Facebook's handling of user's data. 

Take-Two Interactive Software Inc. (TTWO - Get Report) - shares closed down 2.6% on no new news on the same day the company debuted on the S&P 500.

DowDuPont, 3M, Goldman Sachs, JPMorgan, Apple, Nvidia, Facebook and Google are all holdings in the Action Alerts Plus Portfolio. To find out more about these stocks click here.