But the market quickly recovers, with the Dow ending up 152 points, after the Associated Press says its twitter account was hacked.
The video streaming company added 3 million new subscribers, sending shares soaring late Monday. Apple reports after the close.
MSN Money's Charley Blaine discusses what caused recent fluctuations in the precious metal.
Stocks suffer their worst weekly loss since late 2012, and the markets face a tough week ahead with Caterpillar, Apple, Amazon.com and Exxon reporting.
Big Blue has an outsized effect on the blue-chip index because of its price. If the stock were simply flat, the DJIA would be up 100 points.
But IBM shares fall after hours, after earnings miss estimates. Still, stocks may open higher Friday after a Thursday swoon. The major indexes are off more than 2% since peaking last week.
Shares tumble on reports of weakening iPhone and iPad demand. But buying kicks in as soon as $400 is breached.
Earnings and guidance disappoint investors, but CEO Marissa Mayer says it will take time for growth to ratchet up. Shares are holding up.
VIDEO ON MSN MONEY
DATA PROVIDERS
Copyright © 2013 Microsoft. All rights reserved.
Quotes are real-time for NASDAQ, NYSE and AMEX. See delay times for other exchanges.
Fundamental company data and historical chart data provided by Thomson Reuters (click for restrictions). Real-time quotes provided by BATS Exchange. Real-time index quotes and delayed quotes supplied by Interactive Data Real-Time Services. Fund summary, fund performance and dividend data provided by Morningstar Inc. Analyst recommendations provided by Zacks Investment Research. StockScouter data provided by Verus Analytics. IPO data provided by Hoover's Inc. Index membership data provided by SIX Financial Information.
Japanese stock price data provided by Nomura Research Institute Ltd.; quotes delayed 20 minutes. Canadian fund data provided by CANNEX Financial Exchanges Ltd.
TOP STOCKS
In the never-ending contest for sales, American carmakers are pulling ahead.
MARKET DISPATCHES
The Market Dispatches column has been discontinued. Here's where to find the latest stock and business news on MSN Money, and the latest from market writer Charley Blaine.
FRUGAL COOL
Starting Monday, this site is joining forces with MSN Money Smart Spending. Here's why.
MONEY & POLITICS
Breaking up big banks is an untested solution to the too big to fail problem that attempts to isolate and dismantle large, troubled institutions while protecting the rest of the economy.
SMART SPENDING
Take an extra step before donating to a charity that claims to be helping tornado victims: Research them first.
SMART TAXES
The IRS is struggling to combat identify thieves who file fraudulent tax returns in the names of older residents who don't need to file.
