Add training workflow, datasets, and runbook

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964 Glossary
Beta: a measure of how a stock's movement correlates to the movement of the entire
stock market. The beta is not the same as volatility. See also Standard Deviation,
Volatility.
Black Model: a model used to predict futures option prices; it is a modified version
of the Black-Scholes model. See Model.
Board Broker: the exchange member in charge of keeping the book of public
orders on exchanges utilizing the "market-maker" system, as opposed to the "spe­
cialist system," of executing orders. See also Market-Maker, Specialist.
Box Spread: a type of option arbitrage in which both a bull spread and a bear spread
are established for a riskless profit. One spread is established using put options and
the other is established using calls. The spreads may both be debit spreads ( call
bull spread vs. put bear spread), or both credit spreads (call bear spread vs. put
bull spread).
Break-Even Point: the stock price (or prices) at which a particular strategy neither
makes nor loses money. It generally pertains to the result at the expiration date of
the options involved in the strategy. A "dynamic" break-even point is one that
changes as time passes.
Broad-Based: generally referring to an index, it indicates that the index is composed
of a sufficient number of stocks or of stocks in a variety of industry groups. Broad­
based indices are subject to more favorable treatment for naked option writers.
See also Narrow- Based.
Bull Spread: an option strategy that achieves its maximum potential if the underly­
ing security rises far enough, and has its maximum risk if the security falls far
enough. An option with a lower striking price is bought and one with a higher strik­
ing price is sold, both generally having the same expiration date. Either puts or
calls may be used for the strategy. See also Bear Spread.
Bullish: describing an opinion or outlook in which one expects a rise in price, either
by the general market or by an individual security. See also Bearish.
Butterfly Spread: an option strategy that has both limited risk and limited profit
potential, constructed by combining a bull spread and a bear spread. Three strik­
ing prices are involved, with the lower two being utilized in the bull spread and the
higher two in the bear spread. The strategy can be established with either puts or
calls; there are four different ways of combining options to construct the same
basic position.
Calendar Spread: an option strategy in which a short-term option is sold and a
longer-term option is bought, both having the same striking price. Either puts or