History's greatest investor has cancer. Warren Buffett, 81, announced Tuesday afternoon that he has stage 1 prostate cancer. The news is jarring for all of us who value Buffett for his legendary talents, teachings, and philanthropic endeavors. (Read Buffett's letter here -- link opens PDF file.)

I loathe writing about the investing impact of a man's health. But this is the real world, not investing fantasy camp, and Buffett's health is a serious subject for Berkshire Hathaway (NYS: BRK.A) (NYS: BRK.B) investors. That's why I'm doing exactly what Buffett himself would advise today: checking my emotions at the door and letting facts, not feelings, dictate course on three questions:

  1. How serious is Buffett's condition?
  2. What's next for Berkshire?
  3. What's next for Berkshire's stock?

1. How serious is Buffett's condition?
Buffett says his doctors have told him his condition is "not remotely life-threatening or even debilitating in any meaningful way." There are no incidents of cancer elsewhere, and Buffett and his doctors are so confident in his health that they're waiting until mid-July to begin a two-month treatment of daily radiation.


While "cancer" deserves its reputation as a loaded word, not all forms are created equal. In Buffett's case, the early identification and treatment of prostate cancer bodes extremely well. As Fool health care expert Brian Orelli, who holds a doctorate in cancer biology, told me, "Buffett's cancer isn't life-threatening because prostate cancer grows really slowly. The real threat is when the cancer metastasizes -- moves to other parts of the body, typically the lungs, bones, and liver -- but it seems to be caught early enough in Buffett's case. Basically his five-year life expectancy isn't any lower than someone his age without prostate cancer."

In other words, at least when it comes to Uncle Warren's health, we can all exhale.  

2. What's next for Berkshire?
Buffett will face a firehouse of questions about succession planning at the upcoming Berkshire annual meeting, but he should hold off on naming names, given the lack of seeming danger in his prognosis. Shareholders would gain nothing today by learning the name of Berkshire's next CEO. In fact, Buffett's showing his cards could cost Berkshire shareholders.

Buffett's early diagnosis and treatment means he'll very likely sidestep this health problem, which means he could still be comfortably managing Berkshire day to day for at least several more years. Proclaiming a successor today would rob Buffett of several more years to evaluate the primary candidates -- Ajit Jain, Matt Rose, and Greg Abel -- and dishearten the short-listers who get passed over.

Meanwhile, business will go on as usual at Berkshire despite Buffett's cancer. Other than his radiation treatments curtailing his travel, Buffett has no plans to change his daily routine. Not that I'd be concerned if Buffett did take a break -- he is a famously hands-off manager who gives the CEOs of Berkshire's operating companies a wide berth. In fact, the autonomy that his lieutenants have is a big part of Berkshire's success.

There's no company in the world that would miss its CEO less on a day-to-day basis than Berkshire Hathaway. That's by Buffett's own design and is a testament to the quality of Berkshire's people.

3. What's next for Berkshire's stock? 
And here's where things get tricky. On one hand, Buffett's investing prowess and the sweetheart deals he lands for Berkshire are irreplaceable. Worse is that questions about Buffett's health and succession -- which were already a monkey on the back of Berkshire's stock -- will reach a fever pitch and stay that way through the remainder of Buffett's tenure.

But here's a triple load of good news. First, Buffett doesn't appear to be going anywhere anytime soon. Second, Berkshire today is an amalgamation of wide-moat, long-view businesses that Buffett himself has carefully selected over time. Berkshire is built to last.

Third, much like Apple's (NAS: AAPL) shares before Steve Jobs left this world, the market is already pricing a post-Buffett world into Berkshire's stock price. Berkshire today sells for less than 1.2 times book value -- a 23% discount to its 10-year average -- and recently drove the typically cagey Buffett to say "[Berkshire's] stock is selling at a material discount to the company's intrinsic business value, conservatively calculated." That's as close to "Dude, this stock is stupid cheap" as you'll get from Buffett.

BRK.A Price / Book Value Chart

BRK-A Price / Book Value data by YCharts.

Berkshire recently authorized a sweeping, open-ended repurchase plan to capitalize on a cheap Berkshire stock should it fall below 1.1 times book value. That leaves today's Berkshire buyers with a safety net of a buyback program at only 6% below today's prices and upside of 30% if Berkshire coasts back to historical norms. Strap that fat discount on top of the compounding machine that is Berkshire and you're looking at one luscious buying opportunity -- Buffett or no Buffett.

Your next move
Berkshire is my family's largest holding and will stay that way, barring a dramatic turn of events. And if the market throws a fit and sends Berkshire's shares cascading, don't be surprised to see me in line waiting to take shares off the hands of fretful buyers. As the Oracle of Omaha himself is fond of saying, be fearful when others are greedy, and greedy when others are fearful.

And here's wishing Warren a speedy recovery.

At the time this article was published Joe Magyer hopes Warren Buffett recuperates well. Joe owns shares of Berkshire Hathaway, as does The Motley Fool. The Motley Fool has a disclosure policy.

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