One, the 'best-ness' criterion is contingent on the information available. So, new information can cause a previous “best” estimate to be a second best or worst estimate. (An extreme example would be, in a non-financial context, American foreign policy on September 10’2001. The next day’s events – led to wildly different prescriptions than most academics/policy wonks had anticipated.) So, the quanta, quality and timing of information is the key.
Second, the estimate itself is a result of some estimating method – an algorithm, a formulae – that econometricians call “estimators”. In essence, it is not just information that is relevant – but the method in which you process the information. It is entirely feasible, and relatively easy to show, that even with the most recent information using a wrong estimator can result in (a) biased estimates (b) unbiased but highly inefficient (c) biased and highly inefficient estimates. By inefficient, one means estimators that contain within itself the possibility of generating widely variant results as the underlying sample increases in size.
As you can imagine, getting oneself tied up in some subtleties is something that many participants on Wall Street have little time for, or worse, just find it plain useless. One of the biggest games is undoubtedly, inspired no doubt by Whack-a-Mole journalism in American media, is watching the Fed’s decisions on rate cuts. (Things are sometimes so absurd that, as Alan Greenspan writes, there are guys dedicated to watching the size of Greenspan’s briefcase!)
The critical aspect is that the generic expectation is that the Fed will continue to accommodate and allow for a 4% rate over the next six months. i.e., 3/4 of a decrease in rates. Implicit in this expectation is
- Inflation, core or otherwise, will not be a problem. This, despite the clear trends to a 100$ barrel.
- The housing conditions will worsen -- i.e., when over 800billion USD worth mortgages are to be reset over the next two months -- expect a lot more defaults.
- The weakening dollar is not really something the Fed worries about. (How to reconcile rising import costs with its inflation hawkishness is a tricky question!)
Again, my thoughts are that the demand for non-USD denominated assets will continue.