Where are you getting this calculation from?
its in the message posted that you are commenting on:
Isn't MtGox' previous expired 24h (%Pchange)24h: BTC = 14.29 LRUS$ Open, BTC = 18.89LRUS$ Close, giving (%Pchange)24h-4Jun2011 = -32.1903% (smaller than zero value indicates deflation of bitcoin against LRUS$)?
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If I suspect correctly you are trying to keep the price of bitcoins nominally stable in dollars (I can not be sure until you tell me where you get that number). Why would you want to keep bitcoins nominally in line with the dollar? And more important, how does that answer my question?
it was a comment addressing this issue, and your comment on it being impossible to measure the demand for medium of exchange:
With Bitcoins, I see the great opportunity to create a currency that's both value standard and medium of exchange, but, unlike other currencies, you can adjust the supply dynamically to the demand exactly, since the number of transactions and the velocity of money can be calculated exactly. This would result in a currency that's a perfect value standard. Money supply can not be manipulated by governments, since it is coded into the system. Savors had more incentive to save, since their currency holdings would not be devaluated by inflation, giving more and cheaper capital for investments, giving the possibility of more economic growth.
I welcome everyone to work with me together to create an alternative crypto-currency, if the bitcoin community does not want to change its money supply system.
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PS: The M*V = P *Q equation is wrong, but I am accepting for the sake of argument.
Let's say in a village there are 100 eggs everyday on the market (M=100 eggs). Chickens are traded the most on this market and is used as a medium of exchange. Each of these eggs changes hands 2 times on average everyday (V=2 times/day).
On the entire village market, on day 1 and 2 only oranges are traded for eggs.
1: On day 1, 50 oranges are traded for M1=100 eggs in the morning and in the afternoon all M1=100 eggs are traded for 50 apples. Apples do not generally exchange easily for oranges directly normally in this market, as sometimes there are goats, chickens, cows, etc. as well - but we take a simple day for example. Thus for day 1, Q1=[(50 oranges + 50 apples)]. Thus P1=[(50 oranges + 50 apples) per 100 eggs]. V1=2 times/day as eggs changed hands twice on this day.
2: On day 2, 100 oranges are traded for M2=100 eggs in the morning and in the afternoon all M2=100 eggs are traded for 100 apples. Another simple trading day taken as an example to simplify matters. Thus for day 2, Q2 = (100 oranges + 100 apples) = [2 x (50 oranges + 50 apples)]. Thus P2=(100 oranges + 100 apples) per 100 eggs = [2 x (50 oranges + 50 apples) per 100 eggs]. V2=2 times/day as eggs changed hands twice on this day.
So, change from day 1 to day 2 is (%... indicates % change in ...):
%M = (M2 - M1) / M1 = {100 eggs - 100 eggs} / 100 eggs = 0%
%V = (V2 - V1) / V1 = {(2 times/day) - (2 times/day)} / {2 times/day} = 0%
-%P = (P2 - P1) / P1 = {[2 x (50 oranges + 50 apples) per 100 eggs] - [(50 oranges + 50 apples) per 100 eggs]} / {[(50 oranges + 50 apples) per 100 eggs]}
%Q = (Q2 - Q1) / Q1 = {[2 x (50 oranges + 50 apples)] - [(50 oranges + 50 apples)]} / {[(50 oranges + 50 apples)]}
So if M x V = P x Q, and
%M + %V = %P + %Q, then
0% + 0% = -{[2 x (50 oranges + 50 apples) per 100 eggs] - [(50 oranges + 50 apples) per 100 eggs]} / {[(50 oranges + 50 apples) per 100 eggs]} + {[2 x (50 oranges + 50 apples)] - [(50 oranges + 50 apples)]} / {[(50 oranges + 50 apples)]}
Is this true? Simplifying for a = oranges, b = apples, c = eggs, gives:
0% = -{[2 x (50a + 50b) / 100c] - [(50a + 50b) / 100c]} / {[(50a + 50b) / 100c]} + {[2 x (50a + 50b)] - [50a + 50b]} / {[50a + 50b]}
or
{[2 x (50a + 50b) / 100c] - [(50a + 50b) / 100c]} / {[(50a + 50b) / 100c]} = {[2 x (50a + 50b)] - [50a + 50b]} / {[50a + 50b]}
simplifying,
{[(50a + 50b) / 100c]} / {[(50a + 50b) / 100c]} = {[50a + 50b]} / {[50a + 50b]}
simplifying,
1 = 1
resubstitute a = oranges, b = apples, c = eggs, if you like. 1 still remains 1.
So if you say 1 = 1 is wrong, I can't convince you otherwise. You may complicate the example to test it for more complicated scenarios, but I tried to keep it simple.