Wall Street's optimism in last week's preview about the earnings of tech stocks wasn't misplaced, as there were many more positive surprises than negative ones among the stocks we looked at. This week will bring plenty more data for investors in and watchers of the sector to mull over. Apple Inc. (NASDAQ: AAPL), AT&T Inc. (NYSE: T), and Microsoft Corp. (NASDAQ: MSFT), for example, are expected by analysts surveyed by Thomson Financial to post modest earnings gains from a year ago, to $1.11 per share (on $8.1 billion in sales), $0.72 per share (on $31.3 billion in sales), and $0.47 per share (on $14.8 billion in sales) respectively. All three of these companies ended the week closer to their 52-week lows than highs, and analysts on average consider them each a buy.

Here's a look at some of the week's biggest expected earnings gainers and decliners in the sector:

• Baidu.com Inc. (NASDAQ: BIDU): $1.25 per share (+44.0%) on revenues of $134.7 million (+103.2%)
• Broadcom Corp. (NASDAQ: BRCM): $0.44 per share (+38.6%) on revenues of $1.3 billion (+33.8%)
• QLogic Corp. (NASDAQ: QLGC): $0.31 per share (+29.0%) on revenues of $170.0 million (+21.2%)
• FLIR Systems Inc. (NASDAQ: FLIR): $0.32 per share (+28.1%) on revenues of $275.2 million (+44.0%)
• Juniper Networks Inc. (NASDAQ: JNPR): $0.30 per share (+26.7%) on revenues of $927.4 million (+26.2%)
• Waters Corp. (NYSE: WAT): $0.75 per share (+17.3%) on revenues of $391.6 million (+11.1%)
• Flextronics International Ltd. (NASDAQ: FLEX): $0.29 per share (+17.2%) on revenues of $8.7 billion (+57.3%)
• EMC Corp. (NYSE: EMC): $0.19 per share (+10.5%) on revenues of $3.7 billion (+12.9%)

TheStreet.com's Jim Cramer says he doesn't want to make a move until he sees the action.

We aren't oversold enough anymore, and we are up too much. Meanwhile, the next run is on the insurers, as we can tell from the erratic nature of the way that group is trading.

Oh, and what's the deal with Sallie Mae (NYSE: SLM) (Cramer's Take)?

There's not a lot of respite here in part, again, because of Lehman and the default of so much Washington Mutual paper.

We just aren't ready for what is happening yet, and we keep getting surprised about where the paper is. The rescue bill will help, but the pork attachments are so horrible that I believe, ex-FDIC, they have made it tougher to pass, not easier.

General Electric (NYSE: GE) is recently trading at $22.95 in pre-open trading, below its close of $24.50. GE is expected to report Q3 EPS on October 10. GE October option implied volatility is at 69, November is at 65; above its 26-week average of 31 according to Track Data, suggesting larger price movement.

SLM (NYSE: SLM), engaged in education finance, closed at $8.35. SLM October 7.5 straddle is priced at $4.25, November 7.5 straddle is priced at $5. SLM over all option implied volatility of 164 is above its 26-week average of 80 according to Track Data, suggesting larger price movement.

Option Update is provided by Stock Specialist Paul Foster of theflyonthewall.com

This week, we've seen two major buyout deals come undone: the $6.1 transaction for Penn National Gaming Inc. (NASDAQ: PENN) and TPG's play for Bradford & Bingley. In fact, according to FactSet Research, about 20% of leveraged buyouts (LBOs) since mid-2007 have been terminated.

Despite all this, some deals are getting done. Perhaps the most notable is the BCE (NYSE: BCE) LBO. BCE has reached an agreement with its private equity sponsors and banks to close its $51 billion LBO. This will represent the biggest buyout in history.

Now, there are some wrinkles. The closing date will be extended to December and there will not be any dividend payments for the rest of the year. The break-up fee was also upped from $1 billion to $1.2 billion.

Yet, the fact is that the price tag will remain unchanged (at $42 per share). No doubt, this is a big feat, especially in light of the credit crunch.

Apparently, there was much discussion about renegotiating the price. Then again, the prospects of massive litigation were daunting, as we have seen in a variety of other deals such as with Clear Channel, SLM (NYSE: SLM) and Huntsman Corp. (NYSE: HUN).

Tom Taulli is the author of various books, including The Complete M&A Handbook and The Edgar Online Guide to Decoding Financial Statements. He also operates MergerBook.com.

"Since the market started its downturn early this year, I have avoided all financial stocks and resisted the temptation of value plays," says Dave Dyer.

In his Dave Dyer's Newsletter, he explains, "Well, it is now time to violate both of those prohibitions at once." Here, he looks at a new buy for SLM Corporation (NYSE: SLM), commonly known as Sallie Mae, the nation's largest provider of college loans and savings programs."

"There must be some financial areas that have predictable, growing demand, willing customers who actually have low default rates, and securitization processes that do not involve the type of financial engineering that is only intended to hide risk.

"Well, there is such an area, and it even involves a product that it makes sense to finance since it will actually increase in value over time. I'm talking about student loans.

MOST NOTEWORTHY: Citizens Republic Bancorp, Hess Corp and Sanderson Farms were today's noteworthy upgrades:

• Keefe Bruyette upgraded shares of Citizens Republic Bancorp (NASDAQ: CRBC) to Outperform from Market Perform on valuation following yesterday's sell-off, which they attribute in part to its removal from the Dow Jones Select Dividend Index. Shares were also raised to OUtperform from Perform at Oppenheimer following the sell-off.
  
• Goldman upgraded Hess (NYSE: HES) to Buy from Neutral citing the company's leverage to higher oil prices. The firm said oil is likely to hit $150-$200/bbl in the next 6-24 months.
  
• Stephens upgraded shares of Sanderson Farms (NASDAQ: SAFM) to Overweight from Equal Weight as they expect industry fundamentals to improve in FY09.

OTHER UPGRADES:

• Baird raised Stellent (NASDAQ: STEL) to OUtperform from Neutral.
  
• Friedman Billings upgraded Preferred Bank (NASDAQ: PFBC) to Market Perform from Underperform.
  
• Agco (NYSE: AG) was upgraded at Goldman to Buy from Neutral.
• Lehman upgraded SLM Corp (NYSE: SLM) to Overweight from Equal Weight.

MOST NOTEWORTHY: SLM Corp, Tempur Pedic and ITT Corp were today's noteworthy downgrades:

• Morgan Stanley downgraded SLM Corp. (NYSE: SLM) to Underweight from Equal Weight citing the impact on earnings from reduced government subsidies and disrupted capital markets.
  
• Tempur Pedic (NYSE: TPX) was cut to Neutral from Overweight at JP Morgan citing the consumer slowdown and increased competition.
  
• Credit Suisse downgraded ITT Corp. (NYSE: ITT) to Neutral from Outperform citing the surprised management changes announced last night.

OTHER DOWNGRADES:

• Cowen downgraded TechTarget (NASDAQ: TTGT) to Neutral from Outperform.
  
• Merriman lowered Jamba (NASDAQ: JMBA) to Neutral from Buy.
  
• LSI Corp. (NYSE: LSI) was downgraded at Merrill to Neutral from Buy.

JP Morgan downgraded Altria (NYSE:MO) from "overweight" to "neutral" according to Briefing.com. The news service also reports that Morgan Stanley downgraded SLM (NYSE:SLM) to "underweight" from "equal weight."

Lehman Bros. started coverage of NutriSystem (NASDAQ:NTRI) with an "underweight" rating, according to the AP.

Douglas A. McIntyre is an editor at 247wallst.com.

MOST NOTEWORTHY: Schering-Plough, Emergency Medical Services and SLM Corp were today's noteworthy upgrades:

• Banc of America upgraded shares of Schering-Plough (NYSE: SGP) to Buy from Neutral on valuation, as they believe current levels already reflect significant cuts to the company's cholesterol franchise from ENHANCE.
  
• JP Morgan upgraded shares of Emergency Medical Services (NYSE: EMS) to Overweight from Neutral following the company's Q4 results.
  
• Friedman Billings upgraded shares of SLM Corp. (NYSE: SLM) to Outperform from Market Perform and raised their target to $25 from $23 to reflect the company's strengthened capital position, diversified sources of income, and attractive valuation.

OTHER UPGRADES:

• JP Morgan added Molson Coors (NYSE: TAP) to its Focus List.
  
• Citigroup raised Dynegy (NYSE: DYN) to Buy from Hold.
  
• Societe Generale upgraded Credit Suisse (NYSE: CS) to Hold from Sell.

Undergrad and graduate students may soon be feeling the pinch of the subprime mortgage default-induced credit crunch.

Securities tied to student loans have failed to generate investors' interest, leaving roughly $3 billion in a sort of limbo, The Wall Street Journal reported Tuesday (subscription required).

Typically, the banks involved in the deal -- in this case Goldman Sachs (NYSE: GS), J. P. Morgan Chase (NYSE: JPM) and Citigroup (NYSE: C) -- would step in to buy the securities when demand is weak. However, because the major banks are already flush with loans and bonds they're trying to get rid of, they have been allowing the auctions to fail, The Journal reported.

Student loan manager Sallie Mae (NYSE: SLM) fell 42 cents to $19.73 on the news in Tuesday morning trading.

Bond demand is weak

The auction process is similar to those held for municipal bonds, corporate debt and other debt securities. However, Wall Street is not obligated to step in and buy student loan-backed securities when demand is weak.

Judging by my latest emails, everybody wants to know "how should I play the financial sector right now?" Let me make it real simple for you: avoid this entire sector at all costs. Don't buy them and don't short them, at least not yet. I've been repeating the same thing over and over since December, so while I know this will leave many unsatisfied, nothing much has changed in two months. In fact, the recent downgrade concerns over bond insurers MBIA (NYSE: MBI) and Ambac Financial (NYSE: ABK), student lender Sallie Mae (NYSE: SLM) and more importantly, prime mortgage lender Fannie Mae (NYSE: FNM), means the situation has gone from bad to worse. Yes, we still risk economic disaster and that's when defaulting consumers could really hurt credit card companies American Express (NYSE: AXP) and Mastercard (NYSE: MA).

But thanks to the lack of transparency in this industry, there's simply no way to accurately judge how bad things really are and as I learned the hard way, accurately gaming disaster is next to impossible.

The good news is that if I had to guess, I'd say the chances of a true disaster are slim. Given that this seems to be an increasingly popular view, many of these financial stocks have been punished to the point of exhaustion. And just as I wouldn't buy them, I wouldn't short them here either. Despite the seemingly steady stream of negative news, the risk of further damage to shareholders and the overall market crashing all around them, broker stocks like Goldman Sachs (NYSE: GS), Bear Sterns (NYSE: BSC), Merrill Lynch (NYSE: MER) and Morgan Stanley (NYSE: MS) have basically stopped going down. They haven't bounced much either, but the nation's three largest banks Bank of America (NYSE: BAC), Citigroup (NYSE: C) and JP Morgan (NYSE: JPM) have managed that feat, with all three bouncing considerably off their lows.

The Wall Street Journal's "Heard on the Street" column(subscription required) presents a strong bearish case for the for-profit educational providers -- companies such as University of Phoenix operator Apollo Group (NASDAQ: APOL) and ITT Educational Services (NYSE: ESI).

Sallie Mae (NYSE: SLM), a major provider of student loans, has tightened up its lending practices, and that could make career education less affordable for a lot of students.

According to the Journal, "The problem is that the schools will likely struggle to sustain their growth rates because of the tight lending environment and the slower-growing economy. If students have a tougher time borrowing, they may need to pay more out of their own pockets. But if their job prospects are looking rocky, or if they are worried they could be laid off from existing jobs, they won't want to shell out the tuition themselves."

But there may be another element to this that could make the outlook even more bleak for these companies, many of which have a lackluster reputation due to run-ins with regulators and questions surrounding their reporting and the value of the services they provide. Students attending career colleges are also thought to be at greater risk for default.

But here's another rub: Massachusetts' Democratic Governor Deval Patrick has proposed making two-year colleges free for all students -- a move like that would be devastating to the for-profit colleges. If that comes to pass in Massachusetts, or if other states make similar, less radical efforts to lower the cost of two-year colleges, for-profit colleges could see enrollment plummet.

Investors in these stocks will want to keep a close high on the political climate.

For the private equity space, it's been a mixed bag this week. The good news is that the $17.1 billion acquisition of Harrah's Entertainment got done (the largest casino deal in history). The buyers included TPG and Apollo Global Management LP.

But there was some bad news too -- it looks like Blackstone (NYSE: BX)'s proposed buyout of Alliance Data Systems (NYSE: ADS) is on the rocks.

So, in this environment, it's understandable that Wall Street is jittery with buyout deals. Just look at the pending buyout of Clear Channel Communications (NYSE: CCU).

MAJOR PAPERS:

• UBS AG (NYSE: UBS) is launching an initiative to reduce proprietary risk taking by its investment banking division, the Financial Times reported. In an internal memo, UBS CEO Marcel Rohner wrote that the bank would cut by 50% the number of its employees in its real estate and securitization division, and move its troubled mortgage investments into a separate unit.

OTHER PAPERS:

• The UK Times reported that British music company EMI Group PLC (OTC: EMIPY) has made a bid for Chrysalis, one of Britain's last big independent music companies.
• Student loan giant SLM Corporation (NYSE: SLM), also known as Sallie Mae, said it would lay off 350 employees, or about 3% of its workers, the Washington Post said.
• France Telecom (NYSE: FTE) CEO Didier Lombard said sales of Apple Inc's (NASDAQ: AAPL) iPhone device are going better than expected in France, the Associated Press reported.

If one thing stands out in the NYSE short interest for December 31, it is that short sellers are willing to continue their large bets against big U.S. financial stocks.

Short interest in Wachovia (NYSE: WB) rose 20 million shares to 66.3 million. Short interest in Wells Fargo (NYSE: WFC) was up 8.3 million to 76 million. Shares short also moved up sharply for MBIA (NYSE: MBI) and SLM (NYSE: SLM).

The numbers show that some portion of investors believe that stocks which are down 50% or more will continue to fall. A recession or continued rise in mortgage problems could make short sellers a great deal of money.

Going short, however, is risky business. One strong financing for a firm could move its shares up 10% in a day. There is news that Citigroup (NYSE: C) is about to raise more money. There are 97 million shares short in the company's stock, and some of those people are about to get hit.

Douglas A. McIntyre is an editor at 247wallst.com.