frommi wrote:
Error #1: You assume that rebalancing adds miracles to the portfolio where in reality it adds only 1% to the returns. But you ignore the risk of rebalancing when one asset goes slowly to zero.
Where did I assume any miracles? What I said was over 40+ years the real return of the PP has been about 4.5%, and that it has essentially matched a 100% stock portfolio (total stock market, not hand-picked value stocks).
Error #2: You assume that the Max DD of the PP has occured in the past. But what if it lies in the future and is bigger?
Again, where did I assume this? What I said was that PRPFX's drawdown in 2008 was about 20% while BRK-A's was about 50%. PRPFX is similar to the 25/25/25/25 PP, but not identical - just as BRK-A is simply one example of a value portfolio. The max historical drawdown of the 25/25/25/25 PP was actually less than 20%, and in 1980 not 2008. The max stock market drawdown has been something like 90% (from the peak in 1929 to the subsequent low in 1932, and total stock market rather than hand-picked selection of value stocks). Of course, this isn't exactly fair. So how about over the last 40 years? There's a list at
http://pragcap.com/stock-and-bond-drawd ... erspective, showing the top ten (annual!, not peak to trough) stock drawdowns since 1970. The max was 48% in 2008 and all were 17% or more. Maybe hand-picked selections of value stocks would have done better, but I'd bet they'd be in the same ballpark. During this same period, according to Craig's numbers (at
https://web.archive.org/web/20160324133 ... l-returns/) the max annual PP drawdown was 4.1% (not 41%, 4.1%) in 1981. What I'm actually saying is that a diversified portfolio will be inherently more resistant to large drawdowns than a portfolio invested in any single asset class. Do you agree with this or not?
When i buy undervalued securities with a good margin of safety, there is not much to loose. When i buy a stock near its liquidation value, than the only thing that can bring me a loss is when i was wrong on the valuation of the stock or things where not on the balance sheets. But that was than my fault and i can learn from that. What did you learn from the last Drawdown?
Now here's an actual assumption (bold added). Would you care to quantify "not much to lose" in percentage terms? BRK-A is a collection of "value" companies. It took a 50% hit in 2008. I don't know about Buffet's personal portfolio, but I'd guess he took a similar sized hit.
Unless you're buying companies that are already in bankruptcy (value investing ala Michael Price), the liquidation value does not provide an effective price floor.
I'll bet the next time stocks get hammered, value stocks also get hammered and even a hand-picked selection of value stocks will lose much more than a diversified multi-asset portfolio. I'll also bet that over the next couple of decades, a diversified, multi-asset portfolio will do nearly as well (within a percent or two per year) as a 100% stock portfolio, or even 100% hand-picked value stocks. I'm perfectly willing to give up a percent or two per year to avoid getting hammered. But if you're a True Believer
TM in value investing, by all means go for it. Like I said before, different strokes for different folks.