4. THE FISCAL CLIFF: A dreaded package of tax increases and deep spending cuts to domestic and defense programs loomed over the economy in the year's final months. Negotiators struggled to forge a budget deal to avert those measures. If they failed, the tax increases and spending cuts would kick in Jan. 1. That threat was intended to be so chilling that it would force Congress and the White House to take the painful budgetary steps needed to avoid it. Economists warned that if the fiscal cliff measures remained in place for much of 2013, they would cause a recession.
5. FACEBOOK's IPO: Years of anticipation led to Facebook's initial public offering of stock — the hottest Internet IPO since Google's in 2004. Many of the billion or so users of the world's largest online social network craved a chance to buy in early. On the eve of its first trading day, Facebook's market value was $104 billion — more than Amazon.com's or McDonald's at the time. Yet the IPO bombed. Its debut was marred by technical glitches with the Nasdaq exchange, allegations that a revenue gap wasn't publicly disclosed and complaints that the IPO had been priced too high. Traders lost confidence fast. Within three months, Facebook's stock had shed more than half its IPO value.
6. HOUSING RECOVERY: After a six-year slump that sent more than 4 million homes into foreclosure and shrank home prices about one-third nationwide, the U.S. housing market began to recover in mid-year. Modest job gains and record-low mortgage rates fueled demand. And the supply of available homes sank. By June, prices began rising. And builders broke ground on the most homes in four years. Housing boosted economic growth this year for the first time since 2005.
7. THE RETURN OF BIG OIL: Domestic crude oil production achieved its biggest one-year gain since 1951, driven by output in North Dakota and Texas. The United States is on pace to pass Saudi Arabia as the world's top oil producer within two years. Credit goes to drilling improvements, like those that have fed a boom in domestic natural-gas production — horizontal drilling combined with hydraulic fracturing, or fracking. The new production helped cut natural gas prices to their lowest levels in more than a decade. Higher oil production helped reduce oil imports to 1992 levels and hand record profits to U.S. refiners. Gasoline prices declined in the last three months of the year. But for all of 2012, the average gallon was a record $3.63.
8. BANKS BEHAVING BADLY: It was a banner year for bank drama. JPMorgan Chase lost $6 billion in a complex series of trades. And one of its bankers in London grew famous for big bets and became known as the "London whale." Morgan Stanley was accused of botching Facebook's IPO. An ex-banker trashed Goldman Sachs for putting profits ahead of customers and for mocking clients as "muppets." Barclays and UBS were fined for their roles in manipulating a key global interest rate. And HSBC agreed to pay $1.9 billion to settle charges that it enabled money laundering by Mexican drug traffickers.
9. MOTHER NATURE: There wasn't enough rain in much of the nation. Then, suddenly there was much too much. The nation suffered its worst drought since the 1950s, covering 80 percent of U.S. farmland. Grain and food prices soared. Then a storm so destructive it was dubbed a "superstorm" walloped the Northeast. Sandy blasted coastal New Jersey and New York and put 8.5 million customers in 21 states in the dark. Sandy will likely end up as the second-costliest U.S. storm ever after Hurricane Katrina.
10. MOBILE-GADGET WARS: Competition in mobile technology intensified. Apple maintained its worldwide dominance. But the use of Google's Android software on competing smartphones and tablets spread faster than Apple's market share. Forty-four percent of U.S. adults own smartphones, up from about 35 percent a year ago. Tablet ownership doubled in 2012. Taking on Apple's iPad, Microsoft unleashed its Surface tablet and began selling Windows 8, a tablet-friendly operating system. Amazon and Barnes & Noble rushed out high-definition-screen tablets. Each priced its premium model less than the entry-level iPad. Apple struck back with the iPad Mini. Struggling to compete, once-formidable Nokia and BlackBerry-maker Research In Motion floundered.
AP Business Writers Christopher S. Rugaber in Washington and Jonathan Fahey, Erin McClam, Peter Svensson and Barbara Ortutay in New York contributed to this report.