U.S. markets were mixed most of Monday with what felt like very directionless trading on light volume. A selloff late in the day erased the small gains, and markets closed in the red today.

Another weak housing figure did not manage to cause too much harm as -- by now -- investors are conditioned to expect poor housing data. Consumer spending and income rose in February, topping expectations. U.S. investors also continued to expect that oil infrastructure would keep growing based upon Middle East build-outs for expanded production.

Analyst Upgrades

• Alcatel-Lucent (ALU) to buy from neutral at Goldman.
• Nvidia (NVDA) to outperform from market perform at JMP Securities.
• Verizon (VZ), AT&T (T), Leap Wireless (LEAP) and MetroPCS (PCS) to outperform from neutral at RW Baird.
• Illumina (ILMN) to buy from hold at Auriga.
• Sun Bancorp (SNBC) to neutral from sell at Janney Capital.
• American Tower (AMT), SBA Communications (SBAC) and Freeport McMoRan (FCX) to overweight from equal weight at Morgan Stanley.

For the past decade, it's been brutal for shareholders of Alcatel-Lucent (ALU). With the contraction in the telecom market, the sales for equipment has plunged.

Yet since September, investors have been piling into Alcatel-Lucent as the shares have gone from $2.80 to $5.34. The reason? Well, the smartphone megatrend is a key factor. As carriers bolster their networks, they need to go to providers like Alcatel-Lucent.

Analyst Upgrades

• Qualcomm (QCOM) was upgraded to outperform from neutral at Credit Suisse.
• JPMorgan upgraded Allegheny Tech (ATI) to overweight from neutral.
• NetApp (NTAP) was upgraded to buy from hold at Canaccord.
• Estee Lauder (EL) was upgraded to perform from underperform at Oppenheimer.
• Citigroup upgraded Suntech (STP) to hold from sell.

Analyst Upgrades

• Intel (INTC) was upgraded to buy from neutral at UBS.
• Wells Fargo upgraded MetroPCS (PCS), Coventry Health (CVH) and Scientific Games (SGMS) to outperform from market perform.
• Estee Lauder (EL) was upgraded to overweight from equal weight at Barclays.
• Simon Property (SPG) was upgraded to buy from hold at Jefferies.
• Citigroup upgraded BreitBurn Energy (BBEP) to buy from hold.

Analyst Upgrades

• Piper Jaffray upgraded Duoyuan Global Water (DGW) to neutral from underweight, citing the potential for positive fundamental news flow through the end of the year, and upped its price target to $16 from $9.
• Jefferies upgraded Alcatel-Lucent (ALU) to buy from underperform, expecting a benefit from a significant ramp in EVDO software sales as mobile data growth accelerates.
• Myriad Genetics (MYGN) was upgraded at RBC Capital to outperform from sector perform with a $23 price target based on valuation and potential to be acquired.
• Goldman upgraded Mohawk (MHK) to neutral from sell with a $53 price target.
• Smithfield Foods (SFD) was upgraded to outperform from market perform at BMO capital with a $21 target.
• Priceline.com (PCLN) was upgraded to outperform from market perform at Morgan Keegan.

Over the years, Alcatel-Lucent (ALU) has made a variety of bad acquisitions. Of course, the large ones were particularly harmful for shareholders.

So what to do? Well, interestingly enough, Alcatel-Lucent has been recently buying up tiny companies, especially in the fast-growing mobile space.

And the latest deal came this week: OpenPlug (the price tag was not disclosed). Basically, the company creates mobile software development tools.

You win some you lose some. This story is about one of my less successful investments, which I acquired and sold many years ago. Over the past four years, I have written many times about Intuitive Surgical (ISRG), by far my best stock investment, up 4,500%, give or take, over a ten-year period. I bought in at the bottom and held on for the ride, until last year when the market tanked and took Intuitive Surgical with it.

The other company was Superconductor Technologies (SCON), the makers of high-temperature devices that improve communications transmission quality.

Here are some highlights from this past week's earnings coverage on BloggingStocks:

• Alcatel-Lucent (ALU) received an analyst's downgrade following its disappointing earnings report and guidance.
• Chicago Bridge & Iron Co. (CBI) improved earnings prospects prompted one analyst to upgrade the stock.
• Cintas Corp. (CTAS) lower Q3 earnings topped analysts' expectations, and it reiterated its Q4 earnings guidance.
• CRA International Inc. (CRAI) received an analyst's downgrade following its earnings results for Q1.
• Discover Financial Services (DFS) reported a net loss for Q1 due to a needed boost to its loan loss reserves.