QUOTE(kimyee73 @ Dec 30 2016, 05:30 PM)
I'm not sure if anyone else brought this up before as I'm trying to catch up with this thread. I went several pages after and did not see a reply to this.
Your statement is incorrect actually. New fund (8%) would outperform old fund (6%) and here is why. When old fund increased by 6%, that is 6% out of 50%, not out of 100% since your fund at that point in time worth 50%. Your 50% can't just suddenly doubled become 100% if it stays at old fund.
Actually that would be 6% out of 0, because you switched everything to the new fund, you don't gain anything from the old fund any more.
Let's look at this by the numbers.
Scenario 1
You start with 10K. It drops to 5K. It recovers and adds 6%. What do you have now? 10K + 6%.
Scenario 2
You start with 10K. It drops to 5K. You switch all your capital to the new fund. How much can you switch? you can only switch 5k

you can't switch 10K because you no longer have 10K at this point

So you switch 5K to the new fund. It makes 8%. What do you have now? 5K + 8%
Which one is better?
Do you see the trap here? you look at 6% and 8% and you think, you have done better. But you forget, that you lost 50% by switching, when you could have held on and made 6% out of 10k. Remember your starting point for scenario one is say, X. When it drops to X - 50%, then it recovers to X+6%, your stats will still say 6% profit.
If you switch at (x-50%), you will only switch (x-50%) capital, because that's all you have, because
you have to realize your loss before you switch. Now the stats here will play a trick on you. You don't see the actual loss, because as far as new fund is concerned, you are starting with 5K capital. Your old fund is wiped from the table, you don't see your 50% loss, so that is easy to ignore. And then your new fund on the list says 8%.
Later your old fund recovers and makes 6%, and your new fund makes 8%. What you will see on your list is that you have made 8%. Then you look at your old fund at you see that it has increased only 6% from the price you bought in at. And so you think you have made the right decision

If you don't understand this, I'm not sure how to explain this to you any more