Shares of rural broadband and telecom provider Windstream Corp. (WIN), which I first discussed here on January 18, 2010, at a price of $10.92, have recently pulled back about 10% to $12.70. But just view that retreat as an investment opportunity, if you can tolerate the risk.

Underscoring -- WIN's shares are not for the squeamish. If you can tolerate the volatility and you're patient, though, you're likely to be rewarded with WIN.

The stock of Stanley Works (SWK), which I first discussed here on February 10, 2009, at $32.48, continues to power higher, dusting $70 psychological resistance and testing $77 before a recent pullback. If you haven't already, now may be a good time to consider taking some profits off the table, if you're in near $32.

However, those investors who can tolerate the risk can maintain their full position in SWK, as more upside is likely ahead.

Place Whirlpool Corporation (WHR), first discussed here on March 13, 2009, at a price of $34.47, in the not-for-squeamish-investors category.

Appliance manufacturer extraordinaire Whirlpool's stock over-corrected last summer, formed a bear-hug, bottomed at/near $69.50, then recovered to about $90 during the winter -- before recently sliding back to $84. Translation: a roller-coaster -- something that one generally does not see with an industrial player. Even so, I still like WHR here. But hold on to your hat if you own the shares -- the bumpiness could continue in 2011.

And if you haven't already, consider taking some provides off the table with WHR, if you're in at/near $34.50.

Lowe's (LOW) is the world's second largest retailer of home improvement products after Home Depot (HD). Walmart (WMT) and Target (TGT) also cater the home improvements market. Lowe's offers a wide range of home improvement products and installation services to individual home owners as well as professional builders. In addition to the physical stores, consumers can buy products through the company's dedicated website. Lowe's business is vulnerable to the housing market swings and the recent slowdown has affected its sales to a great extent in the past few years.

Truck engine and power generation system manufacturer extraordinaire Cummins Inc. (CMI), which I first discussed here on April 3, 2009, at a price of $29.70, is making a strong case for 2011 "play of the year" -- and it's only April.

Cummins, which is up about 260%, sliced through major, psychological resistance at $100, tested $110, pulled back during the winter and has recently moved back toward $110. Hence, if you haven't already, now would be a good time to consider taking some profits off the table with CMI if you're in near $30.

"Rising demand and constrained supplies are a recipe for higher agricultural prices," notes Elliott Gue.

The contributing editor to Personal Finance explains, "The big winners are commercial farmers and companies whose products enhance crop yields. And one company equipped for growth in this market is Deere & Co. (DE), a new addition to the our model Growth Portfolio.

"For nearly 175 years, Deere has manufactured a wide range agricultural equipment, including tractors, combines, harvesters and sprayers.

The share price of Bank of New York Mellon (BK), which I first wrote about on April 6, 2009, at a price of $28.16, pulled back during the winter, in healthy correction fashion, after pushing through $30 resistance. I still like the business model at this juncture.

Founded by Alexander Hamilton, the Bank of New York, a premier bank and wealth manager, has a stock that's likely to reward patient investors. The bank's 2011 revenue should rise 10% to 15%, then about 8% to 10% in 2012, on higher fees and improving margins. Asset management fees in its equities and fixed income business should record solid increases, on price gains in those markets and due to increased client deposits. New business wins add to the positive mix.

"I suspect that as long as the dollar continues its slide our focus on commodities and resource stocks focusing will prove rewarding," says Jack Adamo.

The editor of Insiders Plus explains, "For our latest buy recommendation we'll revisit an old favorite of ours. Over the years we've held 4 positions in ConocoPhillips (COP) and they've gained an average of about 32% for us.

The stock of (CNQ) pushed substantially higher this winter, clearing major psychological resistance at $50, before pulling back in healthy-correction fashion.

Further, given the better than 50% gain, if you bought Canadian Natural Resources when first discussed here at the split-adjusted price of $31.80 on May 24, 2010, now may be a good time to consider taking some profits off the table with CNQ.

Juniper's (JNPR) shares have risen significantly since the company's previous earnings release unlike Cisco (CSCO), which have trended in the opposite direction. This could imply that investors are more excited about Juniper's upcoming products relative to Cisco's. One of these is its new data center technology previously called Project Stratus, which is now being branded QFabric. Besides Cisco, Juniper also competes with Hewlett-Packard (HPQ), Alcatel-Lucent (ALU) and Huawei-3Com in the network equipment business.

Our price estimate for Juniper's stock stands at $32.59, which is roughly 23% below the current market price.

Canadian National Railway (CNI), which I first wrote about on July 30, 2009, at a price of $47.95, is making a bee-line to $80, and if you haven't already, now may be a good time to consider taking some profits with CNI if you're in near $48.

However, investors who can tolerate the risk can maintain their full CNI position, but keep in mind the journey to $90 may not be completed in 2011.

CNI remains one of best run railroads, bolstered by rigorous cost controls, Look for Canadian National's 2011 revenue to rise 8% to 10%, after a 20% to 25% surge in 2010, as both goods shipment and commodity transport recover; margins will likely increase this year, as well. Volumes also should rise 5% to 7% in 2011, after a double-digit gain in 2010.

American Express (AXP) followed in Visa's (V) steps and announced a digital payment and commerce platform dubbed Serve, which enables the consumers to make purchases and person-to-person payments online via mobile phones and at merchants that accept American Express cards. MasterCard (MA) is also planning to launch its own offering for personal payments.

We estimate that American Express derives 73% of our $49.61 price estimate from card transaction and execution fees while Visa derives almost 29% of its $85.03 Trefis price estimate from transaction fees.