last shot at this: what you said about market price
is the correct definition- but I agree with
@texasmade it's your understanding of "quantity supplied & quantity demanded" being incorrect that's causing the confusion. it's not the
total supply, but the supply at a
given price.
You wrote: "Market price is reached when sellers meet buyers and when they manage to clear out all the supply, after which the demand also becomes zero as there are no buyers left to buy
at that price, even if there was supply left."
emphasis mine on "at that price." so let's clarify the statement.
"Market price is reached when sellers meet buyers and when they manage to clear out all the supply
at that price."
This is what is meant by your earlier definition:
The price at which quantity supplied equals quantity demanded is the market price.
Not the absolute total of supply-
just the supply at that price. You're adding the additional assumption that this statement means "total supply," but it doesn't say that or mean that. we're just talking about supply and demand meeting
at a specific current price.
Continued- You wrote: "If the price would be too low, there would still be buyers and no supply. If the supply was still there then it means that the price was too high."
Clarification/rewrite-of this:
Either the supply or the demand can be cleared out (exhausted)
at a given price. IF the SUPPLY dries up at a given market price but demand is still present, market price moves
up until it finds willing sellers with supply. IF the DEMAND dries up at a given market price but supply is still present, market price moves
down until it finds willing buyers with demand.
Again, nowhere in here is it stated that market price is unknown or somehow dependent upon
total supply. We're talking about supply (or demand) at a given price. In fact, if it was the TOTAL supply, then the additional portion about supply/demand not being present anymore at a given price wouldn't be necessary to the definition at all, and wouldn't be included.
Example: I WANT a Snoopy at retail, but there is NO supply at retail (supply at retail is a non-zero number but might as well be zero). Therefore, my "demand" moves up to a price I'm willing to pay. I'm willing to pay 14k. Unfortunately for me, ten other people are willing to pay 16k. There is no
current demand above 16k. Sellers willing to sell will come down to the demand at 16k; while sellers
unwilling to sell at 16k will keep their list price at higher levels. IF supply remains exactly the same,
either the sellers or the buyers will "give up," and price will move accordingly. To continue this example, Demand still outpaces supply, and BUYERS "give up" at 16k as competition for snoopys is fierce, and soon price is at 18k. I finally give in to FOMO, and buy at 18.5k. Perhaps I was the last person that had to have it at this price, and there are no sales for several days because demand
went to zero at this price. Sellers HOPING to have sold at the 18.5k high are now worried that they won't be able to sell at 16 either, and move back down to 16k, and a buyer steps back in, happy to not have paid 18k and now feeling "lucky" to buy at 16k. Thus, the cycle moves on, and market price constantly fluctuates as long as there is supply and demand for snoopys.
Maybe not perfectly, but yes we can track the last deal made in many cases. I agree it's not exactly the same as it is in other markets- but it's not "impossible" to track last price. Websites attempt to do this, and we have a
decent idea of last price sold in many cases. This is at least partly why market price can range so wildly from one location to another, one day to another. When the bid and ask are far apart (like they are with the snoopy), there's likely to be a wide range of market prices- so using an "average" market price to calculate value is typically the most reasonable course for buyers.
I think the rest of your post is possibly utilizing ideas like "price equilibrium" or some concept of "surplus." I genuinely hope this clears up what market price is- but if it doesn't I gave it my best shot!