Bubb,
I have been thinking the last few days about this in relation to the UK gilt market. QE has led to a dislocation driving down yields and pushing up bond prices. My view is this will be maintained while the BOE is in the market. BOE currently owns 32.4% of gilts and following the UK predicted borrowing figures (similar to OBR figures) by 2016/17 the BOE will own more than half of all gilts issued by my estimation. Not a problem in itself. I have come to the view recently that QE is simply fiscal stimulation through printing, entirely to create inflation and keep rates down to prevent asset price declines to stop a deflationary doom spiral. At present it is working though it is gradually beggaring the population in my view which means it is a race between inflating the currency to catch up with overinflated asset (house) prices and not annihilating the common man to the point of rioting. My long term view through this remains: hold something other than sterling/US dollar/Euro/Yen. (Gold but looking at other options). In my view governments will do whatever is easy. Currently the BOE is simply giving the coupon payments back to the treasury and I suppose they will either cancel the bonds or let them expire far off in the future.
I guess I like many people was wrongfooted by the move in bonds. Its almost a paradox really that the central bank buys gilts with freshly printed paper and the more it does it the higher existing bond prices rise and the lower yields become. That only works with the cooperation and existence of the market IMO. Thus are limits to how far this can be pushed.
The way i see it is that the only thing that matters is when the BOE leaves the market and removes fake demand (voluntarily or not). From that moment on, either gradually or suddenly the dislocation will close as the market sets true value and risk for gilts. This means an inevitable increase in interest rates and a reduction in bond prices. Whether the BOE can leave the market as effortlessly as it entered I don't know.
Shorting bonds has been tried many times in the past with no success, and timing is no doubt the crucial thing.
Things I will be keeping an eye on are: yields for different issues (available from BOE), Long/Short data, breakdown of holders of gilts by type (BOE, Insurance/pensions, Banks!, foreign)
The data from Q3 2008 onwards is very interesting from the BOE. There has been a more than doubling of the national debt over that time. Pensions and foreign holders increased there holdings a little. The BOE bought 375bn. Banks bought 468bn in the same time frame, with buying going from nil upwards 1Q before QE formally began.
Watching what the commercial banks holdings and the yield rates may give an indication when the worm is turning (and an indication to perhaps rotate out of gold).
GB