Offer your thoughts or opinion on the input financial query or topic using your financial background.

Can you step up your cost basis indefinitely via the 0% capital gains rate?
Your real question, "why is this not discussed more?" is intriguing. I think the media are doing a better job bringing these things into the topics they like to ponder, just not enough, yet.  You actually produced the answer to How are long-term capital gains taxed if the gain pushes income into a new tax bracket? so you understand how it works.  I am a fan of bracket topping. e.g. A young couple should try to top off their 15% bracket by staying with Roth but then using pretax IRA/401(k) to not creep into 25% bracket.  For this discussion, 2013 numbers, a blank return (i.e. no schedule A, no other income) shows a couple with a gross $92,500 being at the 15%/25% line. It happens that $20K is exactly the sum of their standard deduction, and 2 exemptions.  The last clean Distribution of Income Data is from 2006, but since wages haven't exploded and inflation has been low, it's fair to say that from the $92,000 representing the top 20% of earners, it won't have many more than top 25% today. So, yes, this is a great opportunity for most people.  Any married couple with under that $92,500 figure can use this strategy to exploit your observation, and step up their basis each year. To littleadv objection - I imagine an older couple grossing $75K, by selling stock with $10K in LT gains just getting rid of the potential 15% bill at retirement. No trading cost if a mutual fund, just $20 or so if stocks.  The more important point, not yet mentioned - even in a low cost 401(k), a lifetime of savings results in all gains being turned in ordinary income. And the case is strong for 'deposit to the match but no no more' as this strategy would let 2/3 of us pay zero on those gains.  (To try to address the rest of your questions a bit - the strategy applies to a small sliver of people. 25% have income too high, the bottom 50% or so, have virtually no savings. Much of the 25% that remain have savings in tax sheltered accounts. With the 2013 401(k) limit of $17,500, a 40 year old couple can save $35,000. This easily suck in most of one's long term retirement savings. We can discuss demographics all day, but I think this addresses your question.) If you add any comments, I'll probably address them via edits, avoiding a long dialog below.