I would say that $36.60 at the time was probably not market value, but I use market value to mean intrinsic value, not the actual current price of the stock. If the market value equaled the stock price then there wouldn't need to be 2 terms/definitions to describe the same thing.
I am not quite sure I see what you are saying in real estate terms, if there is a difference between market value and intrinsic value (I think intrinsic value is what I was trying to describe earlier), then is it the case that market value is exactly what a person paid for a property? What do you do after someone buys a property for $300,000 that appreciated by 10% per year for 2 years? The market value of the property is still $300,000 even when all the other homes in the neighborhood are selling for $363,000?
$36.60 was exactly market value. $3k in index funds purchased at NAV. And you can't use market value to mean intrinsic value. Those are two different terms with two different meanings.
First, even in cookie-cutter suburbia, you're not going to find two identical houses that have sold consistantly at the same price. Location and view will be different, features will be different, etc. But, let's say that you did have such a scenario....
Then let's try this again. You buy a house for $300k. The identical house down the street sells two years later for $360k. In terms of market value, so what?
You estimate, based on that sale, that you should also be able to get $360k for your house so you list it for that. Suppose someone offers you your full asking price. Then, if you are not selling under duress, if your buyer is not under duress, and you are not hiding anything that would materially affect the buyer's use of the property, then you have just established the market value for your house
at the time of the sale.
Before that, you have an estimate of what you feel market value should be. You very well could be wrong.
Three years ago my wife and I looked at a house that was priced at $480k. Based on many factors, we offered $360k. You could say that $360k reflected our intrinsic valuation of the property. The buyer laughed at our offer. Thus, their intrinsic valuation was likely higher than $360k. The house sat on the market for 13 months and finally sold for $350k. During those 13 months, the buyer's valuation dropped until it came in line with the market value.
We just sold our townhouse. We did not need to sell. We bought the townhouse five years ago for $262k. We added about $18k in "stuff" but that "stuff" carries a low intrinsic value for a buyer ($9k in wool carpet, for instance). We sold for $260k. Regardless of tax assessment, realtor guessing, or offers we refused, $260k is the current market value of our house.
Perhaps the trickier point is that it's rather difficult in buying a house to not let emotion into the picture.