Wednesday, November 04, 2009

Buffett's Big BNI Buyout Bets On Buoyancy

Tuesday brought big news on Berkshire Hathaway's proposed buyout of Burlington Northern Santa Fe (BNI) railroad at $100/share, cash and stock. This transaction is a textbook window into Warren Buffett's equity valuation model.

Uncle Warren has dropped hints over the years on how he values a stock. Buffettology books (particularly those by Mary Buffett) have done an excellent job outlining his calculation of "owner earnings" (net income plus depreciation minus average capital spending), his use of the 10-year Treasury yield as a discount rate, and his preference for companies that consistently grow retained earnings per share over long periods.

I built an equity valuation model using these principles and got an interesting result. Discounting BNI owner earnings for the past four quarters at a discount rate of 3.5% (approximately the prevailing 10-year Treasury yield in recent weeks) results in a share price of slightly more than $150. Warren Buffett doesn't buy anything unless he can get a severe bargain, so paying $100 for a stock he believes is worth around $150 represents a 33% discount.

I believe Uncle Warren's key insight is his tweaking of the growth factor used in traditional DCF models. In place of the "b" retention rate for net earnings not spent on dividends, he substitutes the average long-term growth rate of retained earnings on the balance sheet. Multiplying this modified "b" by his version of ROE (owner earnings divided by shareholder equity) gives us the annualized growth factor "g" that he uses to estimate those future owner earnings.

I'm intrigued that Uncle Warren chose to assume BNI's relatively high long term debt load onto Berkshire's balance sheet. Apparently he thinks the cash flow from Berkshire's finance and insurance lines will be sufficient to pay that off. If this gamble works, it gives Burlington the operational freedom needed to continue investing in technological innovation.

It's almost a done deal pending regulatory hurdles. Anti-trust scrutiny will probably force Berkshire to divest its other rail holdings, namely Union Pacific (UNP) and Norfolk Southern (NSC). Forced selling of those large stakes might make them attractive plays for other value-oriented transportation sector investors. It would also give Berkshire additional cash if they need to sweeten this deal.

My play? I immediately sold a few short puts under BNI at 95 on the premise that Buffett's bid establishes a firm floor for the stock and will be approved without any glitches early in 2010. The worst-case scenario for this special situation would be a market dislocation that tanks Berkshire's own share price, forcing it to further dilute its own shareholders to maintain the agreed mix of cash and equity for this buyout. If my puts are exercised against me, my own worst-case scenario is that I end up owning a long-term position in either BNI (if the deal collapses) or Berkshire, two companies that the greatest investor of all time thinks are terrific to have.

Full disclosure: Anthony J. Alfidi is short Jan 2011 puts on $BNI at 95 (covered with cash) and holds no position in any other stock mentioned in this post.