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Sunk Cost Fallacy - Help!

Posted on 3/8/23 at 4:14 pm
Posted by Turf Taint
New Orleans
Member since Jun 2021
6010 posts
Posted on 3/8/23 at 4:14 pm
Seeking MT to set me straight.

I am very familiar with SCF. Yet, I find myself exhibiting it as we contemplate ways to fund a large purchase decision.

Choosing between 2 accounts from which to pull $ for this purchase:

Account 1 - money market account that has made nil for years. Real rate (net of inflation) is negative, unrealized as it may be.

Account 2 - overweighted company stock that has positive Real rate (and pulling from this account re-balances allocation, but that is beside the point (as is the tax efficiency part of the decision that I am purposefully leaving out of this post))

SCF:
I am staring at the unrealized negative real rate on the money market thinking I do not want to realize the negative real rate, so thinking will not tap that account. But, this is SCF thinking. Or, is it?

MT, lay your objective financial sense into this decision, please.
Posted by slackster
Houston
Member since Mar 2009
91362 posts
Posted on 3/8/23 at 5:37 pm to
What’s the purpose of the two accounts?

If you use the company stock, will you buy more of it with the money market funds? If the answer is no, then use the company stock.

If you didn’t own any company stock right now and had all the money in cash, would you buy as much of it as you currently own? If the answer is no, use the company stock.
Posted by thelawnwranglers
Member since Sep 2007
42042 posts
Posted on 3/8/23 at 6:04 pm to
quote:

as is the tax efficiency part


Seems like the most important part of discussion?
Posted by TorchtheFlyingTiger
1st coast
Member since Jan 2008
2920 posts
Posted on 3/8/23 at 9:15 pm to
If you had the $ to invest today where would you put it?

Draw funds from the one you wouldnt choose to be invested in.

Since you're overweight company stock why not sell some to cover purchase? Then, with the MM funds invest in something you prefer moving forward. Improve investment growth potential and reduce concentration in company stock.

Did you expect to make $ in a MM fund? Do you think you will moving forward? Dont expect real growth in MM.
Posted by Turf Taint
New Orleans
Member since Jun 2021
6010 posts
Posted on 3/8/23 at 10:04 pm to
quote:

Did you expect to make $ in a MM fund?


Expected return aside and why MM to begin with…aside for a moment…

Negative real return: unrealized vs realized

If inflation rose and then fell, so too would the negative real return. SFC thinking or not?
Posted by TorchtheFlyingTiger
1st coast
Member since Jan 2008
2920 posts
Posted on 3/9/23 at 12:23 pm to
Sort of because you are considering holding on just because earlier performance was poor. But makes no sense even as SCF in this situation because doesnt sound like a situation where you could reasonably expect to recover loses by waiting for it to recover. Thus, even dumber than SCF. You keep saying taxes, allocation/diversification and expected performance aside. Those should be driving decision along with risk, investment objectives and timeline not what happened to previous investment. So, in that sense its SCF if you must label it. Either way sounds like youre stuck on stupid with this investment and realize it but dont want to act.
Posted by Jag_Warrior
Virginia
Member since May 2015
4292 posts
Posted on 3/9/23 at 12:48 pm to
quote:

overweighted company stock


You realize that’s not good, right? I’d be more concerned with that than some of the other issues you’re focusing on.
Posted by Turf Taint
New Orleans
Member since Jun 2021
6010 posts
Posted on 3/9/23 at 1:30 pm to
quote:

You keep saying taxes, allocation/diversification and expected performance aside. Those should be driving decision along with risk, investment objectives and timeline not what happened to previous investment.


Good post, thx!

All those factors are front and center. In fact, have already acted upon using tax efficiency, expected return and risk/time horizon on next financial goal.

I’m most interested in keeping to the psychology of money points. You hit it for me, particularly on reasonableness of recovery. Stuck on stupid is not inaccurate, too.
This post was edited on 3/9/23 at 1:31 pm
Posted by Turf Taint
New Orleans
Member since Jun 2021
6010 posts
Posted on 3/9/23 at 1:31 pm to
quote:

Overweighted


0.5% overweight. Not astronomical.

Quite the Boglehead in terms of allocation and risk here.
Posted by TigerToGeaux
TX
Member since Nov 2022
167 posts
Posted on 3/9/23 at 1:52 pm to
What is the MM for? Investment? Emergency fund? Opportunity fund? Cash fund? Defacto saving account for infrequent large personal purchases?

If emergency fund, is the purchase an emergency?

And I agree with the recommendation of imagining all of the money in a pile in front of you, what would you do with the rest after you made this purchase? Use the answer to that to decide where you would draw from (as long as taxes don’t blow up the equation).
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