## Quotable Value

Generally the

**of a Quotable Deriscope Object as of time**

*Quotable Value***refers to the number that the referenced Quotable attains at that time**

*t***under certain modelling and marketing assumptions.**

*t*As a demonstration consider the Quotable Deriscope Type of Stock Price.

An object of type Stock Price contains no actual price data. It describes the referenced stock but does not include the price realized by that stock.

Assuming a unique source of market data feeds, the latter obviously will keep changing with time.

Fixing a time, the stock price quoted in our market data feeds will be then referred as the

**of our Stock Price object as of that time.**

*Quotable Value*We may even refer to the price that our Stock Price will attain in some future time under certain modelling assumptions.

In that case the price attained in the future ceases to be a simple number and becomes a random variable represented by a probability didtribution as implied by our modelling assumptions.

This means that the

**of a Quotable object as of a future time**

*Quotable Value***is not a simple number, but rather a random variable.**

*t*Both cases above are unified in Deriscope by treating the

**as an object of type Probability Measure.**

*Quotable Value*This incorporates the simple number case, since any number can be represented as an object of type Exact Number.

Since the

**of a Quotable object represents a random variable that is a function of the observation time**

*Quotable Value***, it follows that the**

*t***of a Quotable object is evolved according to some stochastic process.**

*Quotable Value*