There is virtually no reason to buy a TIPs mutual fund or ETF. Buying individual bonds isn't that hard nor expensive , and I think if you buy them at auction with Schwab or Fidelity you pay almost no market up.
Maybe I have a misunderstanding, but if I hold a bond ETF for it's average maturity shouldn't it be the same as holding one bond (of equal length) until maturity?
Well according to the link Vand posted it did not exactly work out that way for TIPs ETFs. It is like the recent discussion on SEC yield, that was held recently on bogleheads.org and early-retirement.org on SEC yield vs distrbution yield. There are a lot of subtleties in how bond funds work, that are lost on most of us (Definitely including myself in this.)
I also think these super low expense ratio on ETFs and funds are also a bit misleading, since they don't account for things like orderflow. Still, overall the discount brokers like Vanguard, Schwab, and Fidelity provide a good service to their customers.
However, my general view of all financial firms, brokerages, banks, insurance companies, is they are generally quite profitable organization, who employ a legion of bright highly paid individuals who's are quite skilled at convincing you that their financial products, are something you desperately need and are excellent values. I'd prefer to hire as few of these people as possible to manage my money.
Unlike corporate bonds, treasury bonds are a completely a commodity, duration and interest rates are the only variable. If I want to set up a 5 or 10 year bond TIPs ladder, I can buy 5 different bonds, and then when one matures buy a new bond. It takes me 30 minutes to set up and then 5 minutes every year or two to maintain. I'm not sure why I need 1/2 dozen managers/trustee with million $ paychecks, plus support staff to assist me.
When I first retired I bought quite a lot of 10 year TIPS (along with iBonds) which had a 3.6-3.9% coupon rate. I market timed/rebalanced and sold some during 2008/9 to buy stocks. By the time the last ones matured in 2010/2011. There were better bonds to buy, and several years latter, I felt no bonds was best Although my TIPs bond didn't go up as much as anticipated in 2009, any green in sea of red was welcomed. As bonds go TIPs and iBond are arguable the best, but zero real return, less after taxes, isn't a good investment, and funds are worse.