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It's Snake Pliskin said:kennas said:So is price predicatable?
In the short-term with a probabilistic mindset, 50/50 maybe.
In the long-term, there are just too many discontinuous events, too much wild randomality, and other variables to even want to predict.
If you mean that on the market opening each day or at any other given time a given stock's share price has a 50-50 chance of going up or down then I disagree.
There are 3 possible outcomes at any given time:
1. Up
2. Down
3. Steady
Even if the probability of each outcome was equal then each outcome would have a 33.333% chance of happening.
But more often than not the probabilities of each outcome will not be equal and will be affected by events in the minutes, hours, days, weeks or whatever leading up to that given time.
Another example to consider: if you take that classic story about the race between the tortoise and the hare then again there are 3 possible outcomes to the race.
1. hare wins
2. tortoise wins
3. dead-heat
Now, barring the hare taking a power nap when it is way infront and letting the tortoise trundle by, then the probability of the hare winning the race is probably about 99.99999999999999999999999% and not 33% or even 50%.
So in summary - yes share prices are predictable but imo the probabilities of each prediction (or possible outcomes if you want to call them that) should also be stated.....and the probabilities of each outcome are not just simply 1/(number of possible outcomes).