Here are the yields for government of canada long bonds (from http://www.pfin.ca/canadianfixedincome/Default.aspx):

1. Can anybody explain why the yield on the 2064 issue is lower than the 2048 issue? Or why the yield on the 2045 issue is lower than the 2041? Is it a premium that investors are willing to pay for an increase in sensitivity? But if that is the case the 2048 at 1.95 does not seem to fit with that explanation.
Next, I am looking at long bonds at my broker:

2. One question I have here is why are the spreads so different for issues that are so close in maturity? For example the 2045 has a spread of 0.85% vs 1.7% for the 2048. I called them and was told it is 'supply and demand'. Mmmm... Is that right?
3. Another question is, are those spreads 'fair' and how do they compare to what you are paying? A spread of 1.7% is almost 1 year of interest... In his book, HB talks about 1.5% as an upper limit of what one could expect (and that was in 1987)
Any insights appreciated!