We've been struck by the recent appearance (and repetition) of a couple odd notions among the financial commentariat.
First, we've noticed the reappearance of an age-old premise concerning market timing: If you'd missed the five (or ten, or twenty) best days in the last "x" years, your returns would be "y." If you'd missed the five (or ten, or twenty) worst days in the last "x" years, your returns would be "z." Predictably, the gap between "perfect" market timing and "disastrous" market timing is enormous, especially over any meaningful period.
But let's be serious here: Is there a goofier idea in the known universe? Can you imagine any actual investor operating anywhere near such outlying extremes? After all, the "best" and "worst" days in any period tend to cluster around each other during periods of high volatility (such as the one we're in right now*). So missing the best days is likely to correlate with missing the worst ones.
Let's lose the "best and worst days" conceit. Surely we can find subtler, more realistic ways of helping rank-and-file investors understand the difficulties of effective market timing.
Second, we see some version of the "Are we in (or are we about to enter) a recession?" Where to begin with this one. First of all, the NBER's definition of a recession** is inherently arbitrary. (It's perfectly defensible, but arbitrary nonetheless.) So when CNBC anchors ask their guests whether we're in--or will enter, or will narrowly avoid--a recession, what they're really asking is to make distinctions between one arbitrary level and another. The question might as well be: "Do you think GDP growth with be higher or lower than +1.2% in 2008?"
We understand that the NBER's announcement of an official recession would itself have psycho-economic effects. But we're getting a little tired of the obsession with the recession question per se. That said, however, the larger economic questions--How long should we expect sluggish growth? What effect will the U.S. and the rest of the world have on each other? What are the appropriate policy responses to a period of non-trivially slower (or negative) growth?--are perfectly apt.
~~~~~~~~~~~~~~~~
*Here are the daily percentage changes in the S&P 500 thus far in 2008 (through yesterday's close): -1.44%, 0.00%, -2.46%, 0.32%, -1.84%, 1.36%, 0.79%, -1.36%, 1.09%, -2.49%, -0.56%, -2.91%, -0.60%, -1.11%, 2.14%, 1.01%.
**Two consecutive quarters of declining gross domestic product.