Spring has officially begun, and now may be the time to consider some investments that could add a little "spring" to your portfolio.

Topping the list are companies like Lowe's (LOW) and Home Depot (HD). They stand to benefit from the nicer weather as people head outdoors to work on the garden, plant new beds, maintain the lawn, and take care of home improvements.

Back in November, I was cautious on Deere & Company (DE). Yes, you read that correctly: I was cautious on Deere back in November. When it was trading around the $76 level. Let's see, at what price is the stock trading today? At a little after noon, it's exchanging hands for about $95.

As is painfully obvious, my thinking that Deere may have been overvalued late last year has turned out to be rather wrong. As a matter of fact, the one-year chart is defining an attractive uptrend. It's a really fine example of compelling price action.

Deere (DE) shares trended higher as corn has rallied to a 30-month high. Overall option implied volatility of 29 is below its 26-week average of 33, according to Track Data, suggesting decreasing price movement.

ARM Holdings (ARMH) closed down 4.8% after rallying sharply over the past seven weeks. January call option implied volatility is at 75, February is at 67, above its 26-week average of 46, according to Track Data, suggesting larger price movement.

Options Update is by Stock Specialist Paul Foster of theflyonthewall.com.

Analyst Upgrades

• NYSE Euronex (NYX) to conviction buy from neutral at Goldman.
• General Dynamics (GD) to buy from hold at Citigroup.
• Deere (DE), Parker-Hannifin (PH) and ExlService (EXLS) to overweight from neutral at JPMorgan.
• Aflac (AFL) to outperform from market perform at FBR Capital.
• Wynn Resorts (WYNN) to buy from neutral at Janney Capital.
• Amdocs (DOX) to buy from neutral at UBS.
• Juniper (JNPR) to buy from hold at ThinkEquity.
• Rudolph Tech (RTEC) and KLA-Tencor (KLAC) to perform from underperform at Oppenheimer.
• Hershey (HSY) and Pinnacle Entertainment (PNK) to outperform from market perform at Wells Fargo.
• Spirit AeroSystems (SPR) to equal weight from underweight at Morgan Stanley.
• Micron (MU) to outperform from neutral at RW Baird.

Analyst Upgrades

• Deere (DE) to outperform from market perform at Wells Fargo.
• American Eagle (AEO) to buy from neutral at Janney Capital.
• FedEx (FDX) and Shaw (SJR) to outperform from neutral at Credit Suisse.
• Superior Energy (SPN) and Rowan Cos. (RDC) to overweight from equal weight at Barclays.
• Tesoro (TSO) to outperform from neutral at Macquarie.
• Mechel (MTL) to buy from neutral at Goldman.
• SunPower (SPWRA), LDK Solar (LDK) and First Solar (FSLR) to buy from hold at ThinkEquity.

At the time of this writing, Deere & Company (DE) was down 0.6% to $75.87. Earlier Wednesday, the farm-equipment concern issued its Q4 report. You can't call the market overjoyed by the news, but at the same time, this isn't a huge drop. Volume, however, was on the strong side.

According to the Associated Press, Deere made $1.07 per share. This statistic was much better than the loss of 53 cents per share that was booked in the year-ago period (it should be noted, though, that, as the actual press release indicates, last year's adjusted fourth-quarter income was 23 cents per share). Wall Street was interested in seeing at least 95 cents per share.

Deere (DE) is expected to report Q4 EPS on Nov. 24. December 80 and 85 calls are active on total call volume of 3,697 contracts, compared to 1,590 puts. December call option implied volatility is at 34 and January is at 33; compared to its 26-week average of 34, according to Track Data, suggesting nondirectional price movement.

La-Z-Boy (LZB) is expected to report Q2 EPS on Nov. 23. Overall option implied volatility of 68 is near its 26-week average, according to Track Data, suggesting nondirectional price movement.

Options Update is by Stock Specialist Paul Foster of theflyonthewall.com.

Analyst Upgrades

• SanDisk (SNDK) was upgraded to outperform from neutral at RW Baird.
• JPMorgan resumed Potash (POT) at overweight, up from neutral.
• Ariba (ARBA) was upgraded to buy from neutral at Roth Capital.
• Cirrus Logic (CRUS) was upgraded to buy from hold at Jefferies.
• Morgan Stanley upgraded Tesoro (TSO) to overweight from equal weight.
• Solarfun Power (SOLF) was upgraded to buy from hold at Auriga.
• Barclays upgraded Ciena (CIEN) to overweight from equal weight.
• Optimer Pharm (OPTR) was upgraded to outperform from market perform at JMP Securities.
• Argo Group (AGII) was upgraded to outperform from market perform at FBR Capital.
• BofA/Merrill upgraded Green Mountain (GMCR) to buy from underperform and Southern Company (SO) to neutral from underperform.

Among the quarterly results scheduled for this holiday-shortened week, investors may be thankful for the earnings results from Tyson Foods (TSN). The Arkansas-based poultry and meat producer reported on its sustainability efforts and also was named McDonalds' (MCD) supplier of the year during its fiscal fourth quarter. Analysts polled by Thomson Reuters forecast earnings for that period to have doubled from a year ago to 56 cents per share.

Tyson is also expected to post revenue of $7.8 billion for the three months that ended in September, which is 7.4% more than in the same period of fiscal 2009. And the consensus estimate for the full year calls for earnings of $2.08 per share (+87.0%) and revenue of $28.7 billion (+7.3%). Tyson's earnings have been better than expected in recent quarters, beating consensus estimates by as much as 24 cents per share.

Analyst Upgrades

• DuPont (DD) was upgraded to buy from neutral at Goldman.
• UBS upgraded Deere (DE) to buy from neutral and AGCO (AGCO) to neutral from sell.
• Canadian Solar (CSIQ) was upgraded to outperform from neutral at Macquarie.
• Thoratec (THOR) and DTE Energy (DTE) were upgraded to overweight from equal weight at Barclays.
• NICE Systems (NICE) was upgraded to overweight from neutral at HSBC.
• Deutsche Bank upgraded Copa Holdings (CPA) to buy from hold.
• BofA/Merrill upgraded Nu Skin (NUS) to buy from neutral.
• Continental Resources (CLR) was upgraded to buy from hold at Jefferies.

"Commodity prices are surging. But rather than recommending a pure commodity play, I'm intrigued by Deere & Co. (DE), the world's largest manufacturer of lawn and farm equipment," says Dr. Melvin Pasternak.

The editor of Trade of the Week explains, "The stock not only benefits from strong commodity prices, but also more profits for farmers. And with farmers seeing fatter profits from their crops, many are taking the money and putting it into new farm equipment.

"According to the Association of Equipment Manufacturers, September sales of row-crop tractors increased by +46.9% from August, while four-wheel drive tractor sales rose +20.5%.

Deere (DE) is recently up 6% after the U.S. lowered its outlook for corn and wheat production. Call option volume of 21K contracts compares to put volume of 19K contracts. October put option implied volatility is at 29, November is at 32, December is at 33, verses its 26-week average of 35, according to Track Data, suggesting decreasing price movement.

CSX Corp. (CSX) is expected to report Q3 EPS on October 13. October put option implied volatility is at 37, January is at 33, near its 26-week average, according to Track Data, suggesting nondirectional price risk.

Options Update is by Stock Specialist Paul Foster of theflyonthewall.com.

Analyst Upgrades

• Wells Fargo upgraded Accenture (ACN) to outperform from market perform following the company's Q4 results, citing improved tone and increased visibility. The firm raised its target range for shares to $51 to $53 from $41 to $44.
• Macquarie upgraded FirstMerit (FMER) to outperform from neutral and has a $21 price target on the stock. The firm cites FirstMerit's strong fundamentals and competitive advantage for the upgrade.
• Macquarie transferred coverage on Marshall & Ilsley (MI) with a neutral from an underperform based on improved risk/reward.
• Eaton (ETN) was upgraded to overweight from neutral at JPMorgan.
• HSBC (HBC) was upgraded to conviction buy from buy at Goldman.
• Walgreen (WAG) was upgraded to overweight from equal weight at Morgan Stanley.

M & A. That's mergers and acquisitions. They're all over the financial pages. Intel (INTC) is buying Infineon's wireless division for $1.4 billion so the chip manufacturer can diversify beyond computers. HP (HPQ) or Dell (DELL) will end up with 3PAR, a cloud-computing company, at a cost of $2 billion or more. Carl Icahn, the billionaire financier, is making a hostile tender bid for Lions Gate (LGF), the film and television producer. 3M (MMM) is buying Attenti Holdings, an Israeli maker of remote monitoring technology used to track people, for $230 million. Exelon (EXC) is picking up a division of Deere (DE), a renewable energy unit, for about $900 million so it can enter the wind-power segment. Sanofi-Aventis (SNYNF) is trying to buy Genzyme (GENZ) but the board won't accept the bid of $18.5 billion. The board is open to better numbers. There are many more.

Is all this good for investors? Or is there some bad in there?

Deere & Co. (DE) announced stellar earnings for its fiscal third quarter, but a lackluster fourth quarter forecast caused Wall Street to take its eye off of the longer-term picture for the stock.

Deere reported that third-quarter earnings jumped 47% to $617 million, or $1.44 a share -- which is up from 99 cents a share in the year-earlier period -- while revenue rose 16% to $6.84 billion. Analysts were expecting earnings of $1.24 per share and $6.52 billion in revenue.

Unfortunately, this news was overshadowed by the company's announcement that there has been a "sharp downturn" in European sales.

Here's why I think that won't matter so much in the future.