mathjak107 wrote: ↑Mon Jan 12, 2026 12:36 pm
but still holds true .
the base rate is always based on a guess about the future inflation .
so no guarantee you will beat inflation , especially one’s own personal rate of inflation which is very different from just the cpi which is a price change index .
it has no calculation in it for how many times i buy something vs you .
lit contains loads of goods and services in it you or i may not use , or yoh do and i dont .
it does not look at quality . there is more price inflation in higher cost goods but they may last longer .
my 23 year old original north face gear is still in use today .
the cpi also doesn’t reflect how willing we are to make out of class substitutions. like if my no sugar added klondike’s are not on sale i will buy pudding or something else .
also inflation for seniors has been shown to be totally different.
during the early go go years of retirement, those seniors with discretionary spending tend to spend quite a bit .
but then the slow go years come , and a lot of what we used to spend on stops . now what is no longer bought helps defray increases on what continues to go up .
then we hit the no go years where health care ramps up , so seniors tend to spend in a smile shape according to the large scale studies by ty bernke and the sun life study .
so basing one’s personal cost of living can be very different than the cpi numbers
The base rate is not a guess on future inflation. It's how much someone is willing to pay to get the guarantee of the underlying rate of inflation.
Right now it is between about 1.0% to 2.5%, depending for how many years you want to commit.
The CPI is not a perfect measure of inflation. Certainly not going to match anyone's personal inflation.
But it is a somewhat average of everyone's inflation (by definition) and it an excellent proxy for what inflation is.
What can you invest in that is going to give you something that is so closely going to match the rate of inflation (and, hopefully, a little more).
At some points (like March 2020) people were so desperate to own something that had that underlying rate of return that they were willing to accept a negative add-on return.
Meaning that if inflation actually had turned out to be 0% during the term of the bond then they were willing to get back $99 back for their $100 investment (if bought at minus 1.0%).
Of course, they were willing to do that because if inflation had been 8.0% they'd have received back in a year $107 for their $99 investment.
TIPS are not to get rich. Not to create wealth. They are strictly to preserve wealth.