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Here is a recap of the top news items from this week on Wall Street: 1. Shares of Google (Nasdaq: GOOG) tumbled an unprecedented $56 during Friday's session following fourth-quarter top- and bottom-line misses Thursday afternoon.

The search giant posted quarterly EPS of $9.50 on ex-TAC sales of $8.13 billion. The Street was looking for EPS of $10.49 on sales of $8.4 billion. 2.

Patient Yahoo! (Nasdaq: YHOO) investors may have got some resolve this week: after years of inconsistent performance, co-founder and director Jerry Yang announced his resignation.

UPGRADES Credit Suisse upgrades MGM Resorts (NYSE: MGM) from Underperform to Neutral with a price target of $13.

Barclays lifts RadioShack (NYSE: RSH) from Underweight to Equalweight. ThinkEquity raises Cree (Nasdaq: CREE) from Hold to Buy, maintains price target of $30.

Barclays boosts OfficeMax (NYSE: OMX) from Underweight to Equalweight.

SAN FRANCISCO (Dow Jones)--Google Inc. (GOOG) said Wednesday it spent over $1.4 billion on acquisitions in the first nine months of this year, as the Internet search giant seeks to expand into new markets such as local deals and travel services.

Here is a recap of the top news items from this week on Wall Street: 1. Stocks continued to charge this week, extending a 2 percent rise last week.

The S&P 500 closed nearly 6 percent higher this week. Gold remains under $1,700 an ounce and crude oil is hanging around $87/barrel.

The VIX pushed below the 30 level this week, suggesting volatility may be easing, but astute traders would probably argue otherwise.

While seemingly positive developments in the Euroarea helped spur upside in equities, pundits are pointing at a rebound in investor sentiment as main driver. 2.

Motorola Mobility (NYSE: MMI) 56.2% HIGHER; announced Google (Nasdaq: GOOG) will acquire the company in a $12.5 billion deal.

China XD Plastics Company Limited (NASDAQ: CXDC) 39.8% HIGHER; reported Q2 EPS of $0.30, $0.05 better than the analyst estimate of $0.25.

Revenue for the quarter came in at $88.2 million versus the consensus estimate of $78.8 million. Also announced a $100 million equity investment by Morgan Stanley Private Equity Asia.

Here is a recap of the top news items from this week on Wall Street: 1. Shares of Microsoft (Nasdaq: MSFT) sold off each day this week following news the company has agreed to acquire Skype for $8.5 billion from an investor group led by Silver Lake.

Analysts and traders alike are already wondering if Microsoft overpaid for Skype. Rumors on Tuesday suggested Google (Nasdaq: GOOG) was also involved in the bidding for Skype, however stopped at $4 billion. 2.

Goldman Sachs (NYSE: GS) shares fell nearly 7 percent this week as speculation related to a Department of Justice investigation weighed.

This report is an intraday check of some of the more notable stocks that have hit a 52-week high or low so far today. 52-Week High:

• Identive Group, Inc.
  
  (Nasdaq: INVE) high of $5.90. Identive has basically exploded out of the gate, and kept going all day. Shares moved over 120 percent better to the new high today, the highest level that shares have attained since mid-2004.

UPGRADES Piper Jaffray upgraded JDS Uniphase (Nasdaq: JDSU) to Overweight, while the firm raised its price target on the stock from $13 to $17.

UBS upgrades Nike (NYSE: NKE) from Neutral to Buy, price target raised from $84 to $100. Barclays upgraded NetApp (Nasdaq: NTAP) from Equal Weight to Overweight, with a price target boosted from $56 to $67.

Wedbush upgraded Google (Nasdaq: GOOG) from Neutral to Outperform, with a price target increased from $575 to $750.

Here is a recap of the top news items from this week: 1. Indications from the Fed this week showed further evidence that QE2 is undoubtedly on its way.

The minutes from the last Fed meeting, released on Tuesday of this week, discussed why that accommodation may be 'appropriate before long'.

Several members noted that economic growth remains too sluggish to make satisfactory progress toward reducing the unemployment rate.

Additionally, Chairman Bernanke, speaking in Boston on Friday, said that he sees a case for further action given the current too-low inflation. 2.

Would-be Facebook investors will have to wait a while before the company has a ticker symbol like GOOG, MSFT, and YHOO.  Peter Thiel (re)confirmed this afternoon that Facebook won't go public until 2012 at the earliest.

Bloomberg reported the same thing in July, meaning this isn't exactly breaking news, but there is a difference between three anonymous sources and Thiel.  Thiel's about as close to Facebook as anyone other than Mark Zuckerberg can get.