Stocks are whipsawing again today as Mr. Market digests a coordinated worldwide rate cut. After opening 200 points down, the Dow zoomed to a net gain of 150 points before sliding back into negative territory.

These violent swings can be devastating for the short-term investor. But Jon Herring says market volatility is handing long-term investors a once-in-a-generation chance to buy world-dominating companies at bargain prices.

Jon recommends seven stocks that are price leaders or have pricing power.

China is renovating, expanding or introducing public transport systems in nearly all of its major urban centers. This is clearing the way for a revolution in advertising.

Penny Sleuth’s Jim Nelson says small cap VisionChina Media (NASDAQ:VISN) is perfectly poised to profit in this fast-growing sector. The company installs digital TVs and sells advertising time on them.

VISN has an established client base, its revenues are soaring, and it has no debt. Best of all: Its stock has been vastly oversold in a recent correction.

St. George Agrees to Takeover; Chile’s Pension Funds go Global; Lights Out at LSE; KDB Warned Over Lehman; United Air’s Costly Misprint; Consumer Spending Cutback; Oil Traders Eye Ike; P&G Sells Noxzema

Even the most savvy investors have been stung by this year’s equity meltdown. Warren Buffett’s investment vehicle, Berkshire Hathaway (NYSE:BRK.A, BRK.B), is down 24% from its peak in December 2007.

Alexander Green says BRK’s drop creates an outstanding buying opportunity. Buffett has an unrivaled track record as an investor. He has always followed a disciplined value-based strategy. And this still holds true today.

BRK.B shares are trading at $3,860, down from a 52-week high of $5,059. This makes them a no-brainer buy right now.

Tuesday morning I received an email from one of financial publishing’s legends. It said, “Market crashing! Last chance for today’s flash alert!” The email came at 10:00 AM, and I didn’t open it until 10:20, minutes before I go into lock down… my four-hour communications blackout during which I write – nothing else. Of course, “Market Crashing!” is an inflammatory subject line.

With oil trading near a three-month low (and corn now at a four-month low), U.S. Federal Reserve policymakers may have just the ammunition they need to hold the line on interest rates for the foreseeable future – or at least until their Sept. 16 policymaking meeting.

Sony Goes Solo; P&G’s Socks Strong Second Quarter; Service Sector Shrinks; D.R. Horton Now a Fixer-Upper; Lehman in For a Trim; Adidas Brings its “A” Game; Farmland Values Skyrocket; Russian Fire Sale

• Bertelsmann AG will sell its half of Sony BMG Music Entertainment to Sony Corp. for $900 million giving the Japanese company full ownership of the joint venture, The Associated Press reported. A statement released by the privately held Bertelsmann said the new company will be called Sony Music Entertainment Inc.

• The Procter & Gamble Co. (PG) reported a 33% jump in fourth-quarter profit yesterday (Tuesday) as the consumer-products maker overcame soaring energy and commodity costs with higher prices and product improvements. The company said it earned $3.02 billion, or 92 cents per share, up from $2.27…

Christian Hill at Investors Daily Edge looks ahead so some important data releases and earnings reports this week. Top of the bill is today’s Fed meeting, where Bernanke & Co are almost certain to keep rates unchanged…

U.S. Federal Reserve Chairman Ben S. Bernanke and his fellow central bank policymakers will be back in the spotlight this week as the group convenes for its monthly monetary-policy meeting.

ADP Paints Positive Job Picture; MetLife Buys into Mortgages; United’s Ongoing Cost Battle; Smucker Strikes a Deal with P&G; U.S. Service Sector Continues to Grow; Emerson Abandons Bid for Chloride; Bob Evans Serves Meaty 4Q Profits; Icahn Moves to Replace Yahoo’s Yang