In our last poll on 27 JUN, 61% of you predicted that CL would hit $154 in the front month before it hit $126, and only 9% of you predicted that CL would hit $126. Well, we've briefly broke that number today

I'm wondering which benchmarks we're using for the oil price, because Tapis closed at US$152.38 on 16Jul08, I didn't watch for it but it may have hit $154 the next day before this week's drop.

So rather than saying that the price of crude dropped to $126, I think it would be more accurate to say that since your last poll, the price of crude rose steadily from $126 to $154, but in the last week has traded in the $126-$154 range.

I think it might be worth making these polls on a regular schedule - every month, or every quarter. Any period chosen is arbitrary - 15Jun-15Jul is neither more nor less meaningful than 01Jun-01Jul - but having the polls at these random intervals turns it into a cherry-picking exericse. By bringing up a poll on a price high we overemphasise the rises, by brining it up on a low we overemphasise the drops.

For example, because you put the poll today at a low you're getting a poll result of around 40% saying it'll rise; had you put the poll a week ago when Tapis was near the $154 mark, I think you'd have got the old results of 60% or so saying it'd rise.

It'd be a bit like polling Americans on how they thought WWII was going after the battle of Monte Cassino, and then a week later after the landings at Normandy. By choosing when to do the poll you'd get different results.

It'd be better to have the polls at regular intervals.

NYMEX CL, or the oil price that is in the yahoo box in the right. We have a new poll a) when 60 days have expired without hitting a boundary from the previous poll, or b) when we hit a 10% boundary. We did not hit 154 in NYMEX CLQ/U08 at any point, but we did go through 127 today briefly, therefore we hit a 10% boundary from the previous poll.

Regular intervals would be just as, if not more arbitrary; at least with these conditions, we have conditions for expiry. If oil goes through 114 tomorrow, then we will have another poll tomorrow night. If nothing happens in the next 60 days, then we have another poll then.

A Poll is a "sampling"exercise, and I agree with Kiashu that it would preferable to sample on a regular basis ..... and otherwise to sorta pay tribute to the sampling theorem in organizing the interval not only to be regular(ized), but also to be sufficiently fine to display the underlying process you want to elucidate ....
so as to avoid alias distortion.

I can assure you that there are few polling agencies out there who consistently use "time" as the basis of putting multiple polls into the field, even if they end up being non-random or event driven. If anything, the method I am employing here is more valid than what you propose because it attempts to capture the motivation/momentum after large moves in the market if they occur. Otherwise, it is exactly the design you propose with an interval, mine just happens to be 60 days instead of 30.