By Ben Fox Rubin 
 

As 2013 rings in, the fiscal cliff will again be the primary focus of the financial world next week, as investors wait to see if lawmakers reach a deal to lessen the impact of tax increases and spending cuts set to take affect in the new year.

After a particularly slow week for quarterly results and data reports, both will pick up next week, with critical December retail same-store sales numbers, the monthly jobless rate and a handful of quarterly earnings reports scheduled.

 
   Stocks Showing Pain from Fiscal Cliff Talks 
 

After markets remained relatively upbeat in past weeks, stocks have been barrelling downward for what should be a fifth straight days as negotiations on avoiding the fiscal cliff have stalled.

Amid growing pessimism over the chances of a last-minute deal, Congressional leaders and the White House were preparing to meet Friday afternoon and the House of Representatives is set to reconvene Sunday evening.

For months, economists have warned that the fiscal cliff, a mix of $500 billion in tax increases and spending cuts set to take effect Jan. 1, could clobber the country's fragile economic recovery and force it back into recession.

Any resolution would likely be a scaled-back version of the package President Barack Obama and Congressional leaders expected to pass after the November election.

 
   Mosaic, Family Dollar, Sonic 
 

Fertilizer producer Mosaic Co. (MOS) is expected to post sharply lower fiscal second-quarter earnings Friday, after it cut its potash and phosphates sales volume expectations last month, pointing to weak demand.

Still, the company said it believes that customer demand is simply delayed, adding that the long-term prospects for crop-nutrient remains positive. To that end, analysts polled by Thomson Reuters do see a sizeable improvement in earnings for its fiscal third quarter, which ends February.

Meanwhile, Family Dollar Stores Inc. (FDO) on Thursday should provide more information into early shopping patterns during the holiday season. The discount retailer is expected to record higher first-quarter earnings for the period, which ended November.

Additional companies set to report next week are restaurant operator Sonic Corp. (SONC), athletic retailer Finish Line Inc. (FINL) and egg producer Cal-Maine Foods Inc. (CALM).

No initial public offerings are expected to start trading next week, according to IPO Boutique's website.

 
   December Jobs Report, Factory Data Next Week 
 

The December jobs report, scheduled for Friday, is expected to show almost no pick-up in hiring, according to economists surveyed by Dow Jones Newswires. The median forecast expects nonfarm payrolls increased by 150,000 this month, little different from the 146,000 new jobs created in November.

The December jobless rate, which may reflect some lingering impacts from Hurricane Sandy, is forecast to rise to 7.8% after the rate unexpectedly dropped to a near four-year low of 7.7% in November. Still, much of that decline reflected jobseekers dropping out of the labor force rather than more workers finding employment.

Next week will also see release of the widely watched business surveys conducted by the Institute for Supply Management, as well as December same-store sales data from several retailers and monthly car-sales figures.

 
   Jobs Outlook Could Jolt Treasury Market 
 

Looking further down the road, should the unemployment rate continue to decrease in the months ahead, Treasury bonds would likely lose their luster as investors' sentiment toward the U.S. growth outlook brightens.

Perhaps more importantly, a stronger labor market and potentially firmer economy would also have investors starting to speculate that the Federal Reserve may reverse its ultra-easy monetary policy earlier than expected in mid-2015, traders and analysts said.

Such a reversal in policy could take months to transpire, but a change in expectations from investors would move markets well before the Fed moved itself.

--Kathleen Madigan and Min Zeng contributed to this article.

Write to Ben Fox Rubin at ben.rubin@dowjones.com.

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