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2019 | OriginalPaper | Buchkapitel

1. Preliminaries via Gambles

verfasst von : Donald G. Saari

Erschienen in: Mathematics of Finance

Verlag: Springer International Publishing

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Abstract

Before tackling the complexities of the financial market and encountering unfamiliar words such as “options,” “hedging,” “arbitrage,” “Puts,” and “Calls,” consider a simpler issue that, in fact, captures much of what will be discussed. Suppose next Sunday there will be a football game between the Vikings from Minneapolis and the Packers from Green Bay.

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Fußnoten
1
Outrageous! But this is the actual choice offered by a student during a course!
 
2
An unlikely outcome has the coin stopping on edge: Once, while with faculty from Boston University after giving a colloquium talk, I spun a penny to illustrate the unexpected H and T values described in this example. To everyone’s surprise, the penny stopped—on edge! Now that this “once in a lifetime” event is behind us, treat “landing on edge” as having a zero probability. That is, if E represents “edge,” then p(E) = 0. As this description illustrates, the probability of an event being zero need not mean it is impossible. It only means it is smaller than any imagined positive number, no matter how small.
 
3
After a class of mine discovered these values, I learned that some of the students used this fact to increase their discretionary funds.
 
4
The original notation was “pdf,” which now is more commonly associated with something else in common use.
 
5
When a bet is made, don’t we see the odds? Yes, but they are based only on how much money has been bet on each horse up to the moment; the final odds are determined by the money bet when the betting stops. This feature is captured in movies where heavy bets are made just prior to race time.
 
6
Notice how these expressions assume the form of Equation 1.27.
 
Metadaten
Titel
Preliminaries via Gambles
verfasst von
Donald G. Saari
Copyright-Jahr
2019
DOI
https://doi.org/10.1007/978-3-030-25443-8_1

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