After a topsy-turvy ride in 2011, stocks ended the year about where they started. And the uncertainty is likely to linger into 2012, prompting many market strategists to advise that investors remain defensive.

For some, that may mean favoring stocks of companies based in the United States, where the economy appears to be picking up steam. Europe remains mired in crisis, and emerging economies could become more susceptible to a recession in portions of the eurozone.

A renewed focus on U.S. stocks could mean that fundamentals like valuations and company profits will again preoccupy investors after a year in which risk aversion drove many to the perceived safety of Treasurys and gold.

For investors seeking reliable clues about what's likely to work in this market, StockScouter's Benchmark Portfolio for January is an ideal place to launch investment research.

The portfolio was created using StockScouter, MSN Money's stock-picking tool. Each month, StockScouter generates a list of 50 stocks whose business fundamentals, price behavior, valuation and stock-ownership characteristics appear to predict a rising price in the coming weeks, based on how those factors have influenced stock prices in the past.

Here are StockScouter's best investment ideas for January.

 
StockScouter Benchmark Portfolio for January
CompanySectorDec. 30 closeScouter score, Jan. 3
Enbridge Energy Management (EEQ, news)Oil and natural gas$34.769
Aircastle (AYR, news)Investments$12.72N/A
Rail America (RA, news)Freight hauling$14.899
Capital Product Partners (CPLP, news)Shipping$6.13N/A
MGE Energy (MGEE, news)Utilities$46.777
USA Mobility (USMO, news)Wireless communications$13.878
TAL International (TAL, news)Freight hauling$28.798
Roadrunner Transportation Systems (RRTS, news)Air freight$14.138
Ecopetrol (EC, news)Oil and natural gas$44.5210
Global Partners (GLP, news)Petroleum products$21.878
Safeguard Scientifics (SFE, news)Business services$15.797
Kinder Morgan Management (KMR, news)Pipelines$78.529
Rigel Pharmaceuticals (RIGL, news)Pharmaceuticals$7.898
Whiting USA Trust I (WHX, news)Oil and natural gas$16.758
STR (STRI, news)Business services$8.236
Main Street Capital (MAIN, news)Investments$21.2410
Education Realty Trust (EDR, news)REIT$10.238
Capstead Mortgage (CMO, news)REIT$12.4410
PennyMac Mortgage Investment Trust (PMT, news)REIT$16.6210
CoreSite Realty (COR, news)REIT$17.8210
State Bank Financial (STBZ, news)Banking$15.1110
Community Trust Bancorp (CTBI, news)Banking$29.4210
Excel Trust (EXL, news)REIT$12.0010
Triangle Capital (TCAP, news)Asset management$19.1210
World Acceptance (WRLD, news)Consumer finance$73.508
First Financial Bankshares (FFIN, news)Banking$33.4310
Inland Real Estate (IRC, news)REIT$7.6110
Legacy Reserves (LGCY, news)Oil and gas drilling$28.2410
Employers (EIG, news)Insurance$18.0910
RTI Biologics (RTIX, news)Medical supplies$4.449
Winthrop Realty Trust (FUR, news)REIT$10.1710
Calumet Specialty Products Partners (CLMT, news)Petroleum products$20.1610
OSI Systems (OSIS, news)Electronic systems$48.7810
Rex American Resources (REX, news)Specialty chemicals$22.1110
SPS Commerce (SPSC, news)Business services$25.9510
Pebblebrook Hotel Trust (PEB, news)REIT$19.1810
Chesapeake Lodging Trust (CHSP, news)REIT$15.4610
American Electric Power (AEP, news)Utilities$41.319
NorthWestern (NWE, news)Utilities$35.799
ITC (ITC, news)Utilities$75.889
Entergy (ETR, news)Utilities$73.059
El Paso Electric (EE, news)Utilities$34.649
Brookfield Infrastructure Partners (BIP, news)Utilities$27.70N/A
Kansas City Southern (KSU, news)Freight hauling$68.019
Bio-Reference Laboratories (BRLI, news)Medical testing$16.279
Polaris Industries (PII, news)Off-road vehicles$55.988
Material Sciences (MASC, news)Industrial materials$8.229
First Commonwealth Financial (FCF, news)Banking$5.268
High-Tech Pharmacal (HITK, news)Pharmaceuticals$38.899
Rudolph Technologies (RTEC, news)Scientific instruments$9.269

Putting StockScouter to work

Investment research company Verus Analytics (previously known as the quantitative business unit of Gradient Analytics) uses StockScouter to create daily and monthly stock lists. Writer Jon Markman, at the time a columnist for MSN Money, collaborated with Gradient researchers on the tool.

An investor who began in 2001 investing in each of the top 10 stocks at the start of the month, selling them at the end of the month and then starting fresh with another 10 stocks, would have generated returns, before trading costs and taxes, of 701% through Dec. 31.

Markman, in this column, suggested rolling over the top 10 stocks every six months to hold down trading costs, a strategy that might be a better fit for most investors; that would yield different results, which would vary based on your starting point.

An innovative mix

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StockScouter depends on advanced mathematics and software, as well as an innovative mix of measurements and historical testing to forecast the short- and long-term outlook for all U.S. companies that have traded on the major exchanges for at least the past six months.

The analytical tools score stocks on fundamental, valuation, technical and ownership components.