Shares of CardioNet (BEAT) were punished Monday morning after an unfavorable decision from the Centers for Medicare and Medicaid Services (CMS). The administrative group proposed that the reimbursement rates on the technical component of mobile cardiovascular telemetry should stay carrier-priced for 2011, defying CardioNet's wishes to obtain a national reimbursement rate for the technology.

Now, CardioNet will attempt to lobby CMS during the public comment period prior to the final ruling, which is due by Nov. 1. "We will work diligently during the public comments period to request that CMS change its recommendation to one that is more beneficial to Medicare recipients who depend on" devices containing CardioNet's technology, explained CEO Joe Capper.

Today was one of those days that was going to start out soft, but a key analyst upgrade saved the day. There was actually no early economic data, and traders are putting on their pre-earnings trades. Here is a quick look at the earnings previews for this week's key technology stocks and for this week's key financial stocks.

Here were today's unofficial closing bell levels:

Dow 8,313.92 +167.40 (2.05%)
S&P 500 901.05 +21.92 (2.49%)
Nasdaq 1,793.21 +37.18 (2.12%)

Top Analyst Calls

Analyst Upgrades

• Goldman upgraded Yum! Brands (NYSE: YUM) to Buy from Neutral on expectations business in the U.S. and China will improve in the second half of 2009. Goldman raised its target price on shares to $40 from $36.
• Canaccord upgraded Exco Resources (NYSE: XCO) to Buy from Speculative Buy citing the company's financial transactions to reduce debt. The firm, which has a $17 target on the stock, says Exco now has a stronger balance sheet, a greater geographic focus, and the ability to expedite drilling programs.
• ThinkEquity upgraded Shanda (NASDAQ: SNDA) to Accumulate from Source of Funds and raised its target to $60 from $50. The firm believes recent weakness on regulatory concerns is overdone and that Q2 estimates are conservative.
• Mack-Cali Realty (NYSE: CLI) was upgraded to Overweight from Equal Weight at Barclays.
• Marvel Entertainment (NYSE: MVL) was upgraded to Overweight from Neutral at JPMorgan.
• France Telecom (NYSE: FTE) was upgraded to Outperform from Underperform at Credit Suisse.

This post was written by Minyanville contributor Steve Smith.

Shares of CardioNet (NASDAQ: BEAT) shares are off $0.20 to $18.60 and option volume is three times the daily average. The focus is buying in the June $17.50 put which has seen over 5,100 contracts trade, 90% of which occurred at the ask, and exceeds prior open interest of if 1,018 contracts. This new put buying is driving up implied volatility 14% to the 65% level this morning.

CREE Inc. (NASDAQ: CREE) shares are up over 12% to $31.30 after the electronics parts manufacturer pre-announced and raised guidance. Options running 3X the daily average with 85% of trades on the call side. Active strikes are the include June $30 call and July $30 calls, with latter's volume exceeding strike's of 295 exceeding prior open interest. Notable is buying in longer dated series; the Sep $30 call, Dec $35 call and Jan 2010 $30 call have all traded over 200 contracts all of which exceed their strike's prior open interest.

Patriot Coal (NYSE: PCX) is up 19 cents to $9.15 and 2,500 Jun 10 calls traded. Nearly all the volume has been done at the asking price suggesting this speculative call buying.

Analyst upgrades:

• Citigroup upgraded Research in Motion (NASDAQ: RIMM) to Buy from Hold and added the stock to its Top Picks Live List. The firm believes RIMM's outlook is more secure given its unit growth trajectory and stabilizing margins. Citi raised its target on the stock to $100 from $65.
  
• Morgan Stanley upgraded Microsoft (NASDAQ: MSFT) to Overweight from Equal Weight following the company's Q3 results it believes growth is accelerating and expectations are low. The firm raised its target on the stock to $24 from $21.
  
• Deutsche Bank upgraded Huron (NYSE: HURN) to Buy from Hold as it believes bad news is already priced in and FY09 expectations are achievable. The firm keeps a $46 target on the stock.
• Credit Suisse (NYSE: CS) was upgraded to Neutral from Sell at UBS.
  
• Quicksilver (NYSE: KWK) was raised to Buy from Neutral at Banc of America/Merrill.
  
• EIG Resources (NYSE: EOG) was lifted at Goldman to Conviction Buy from Neutral.

Analyst upgrades:

• Stanford raised Fluor (NYSE: FLR) to Hold from Sell primarily due to valuation.
• Citigroup upgraded Cadence Designs (NASDAQ: CDNS) to Buy from Hold because they think the company's cost restructuring initiative and its new CFO will be catalysts for the shares.

Analyst downgrades:

• Stephens dropped Ann Taylor (NYSE: ANN) to Equal Weight from Overweight because they no longer view LOFT as a compelling reason to invest in the company.
  
• Citigroup downgraded Hershey (NYSE: HSY) to Hold from Buy on valuation.
  
• KeyBanc dropped Lennox (NYSE: LII) to Hold from Buy on valuation.

Analyst initiations:

• Coverage of Hershey was assumed with a Sell by Stifel, which cited valuation for its rating.
• FARO Technology (NASDAQ: FARO) was initiated by Needham with a Buy rating.
• Leerink Swann resumed coverage of Cardionet (NASDAQ: BEAT) with an Outperform, as the firm predicts that the company's technolgoy will enable it to grow substantially.

MOST NOTEWORTHY: Cardionet, Molson Coors and TIM Participacoes were today's noteworthy initiations:

• Cardionet (NASDAQ: BEAT) initiated with an Overweight, target $29 at Thomas Weisel, who believes Cardionet is well positioned for future growth in the ambulatory monitoring market.
  
• Molson Coors Brewing Co. (NYSE: TAP) was initiated with a Market Perform, target $61 at BMO Capital.
  
• TIM Participacoes (NYSE: TSU) was re-initiated with an Outperform at Bear Stearns.

OTHER INITIATIONS:

• Invesco (NYSE: IVZ) was initiated with an Overweight at J.P. Morgan.
• Orion Marine Group (NASDAQ: OMGI) was initiated with a Buy, target of $18, at SMH Capital.
• Seattle Genetics Inc. (NASDAQ: SGEN) was initiated with a Neutral, target of $12, at Bank of America.

MOST NOTEWORTHY: Visa, Cardionet and Motorola were today's noteworthy initiations:

• RBC initiated Visa Inc (NYSE: V) with an Outperform based on margin expansion opportunities, the secular growth story towards electronic payments, lack of credit risk, and international opportunities. Piper started Visa with a Neutral rating. While the firm believes that Visa should generate long-term earnings growth and free cash flow, the firm thinks that Visa's valuation has increased the risk that strong earnings growth may not meet investors' expectations. However, the firm believes that Visa can still post strong results despite the U.S. consumer slowdown. Goldman initiated Visa with a Buy rating and $90 target and Morgan Stanley started shares with an Equal Weight rating and $75 target.
• Citigroup rated Cardionet Inc (NASDAQ: BEAT) a Buy, citing favorable arrhythmia monitoring trends. The firm has a $26 target on Cardionet.
• Motorola Inc (NYSE: MOT) was assumed with an Equal Weight rating and $75 target at Morgan Stanley on valuation.

OTHER INITIATIONS:

• Merriman initiated Netezza Corporation (NYSE: NZ) with a Neutral rating.
• Credit Suisse started Cascal N.V. (NYSE: HOO) with a Neutral rating and $11.65 target.