Warren E. Buffett, Chairman and Chief Executive Officer of Berkshire Hathaway, testifies before the Financial Crisis Inquiry Commission during a public hearing in New York in this June 2, 2010 file photo. Reuters/Shannon StapletonWarren Buffett’s Berkshire Hathaway struck a deal to buy lubricants maker Lubrizol for $9 billion in cash to tap rising demand for chemicals used to operate engines and machinery. Shira Ovide of the Wall Street Journal takes a spin through Lubrizol’s fundamentals and businesses.

The Ontario Teachers’ Pension Plan is shopping around its 66 percent stake in Maple Leaf Sports and Entertainment, the owner of the Toronto Maple Leafs hockey team and the Toronto Raptors basketball team.

Venture capital investment in U.S. clean technology companies rose 46 percent to $5.1 billion last year after a big decline in 2009, according to a report by research firm Clean Edge.

Could Los Angeles-based Leonard Green & Partners do better than team up with owner-managers to buy discount chain 99 Cents Only? Bloomberg’s Tara Lachapelle and Rita Nazareth make a case for why a leveraged buyout of Dollar Tree  may offer the biggest bang for the buck, citing Bloomberg data that Dollar Tree holds three times as much cash as Family Dollar, is more than twice as profitable as 99 Cents and generates 55 percent more income per dollar of sales than Big Lots.