It's no wonder people get confused, there are so many analogies utilized, that people lose track of the actual subject matter.
In Options if we look at some of the facts surrounding the use of *probabilities*.
When using *probabilities* to trade Options, probabilities are based on the Law of Large Numbers, thus, for probabilities to provide you with a theoretical edge, you must have a large number of trades.
Many trades = at least 100 positions.
If each credit spread [hedged position] exposes you to $2000 risk the;
100 postions = $200,000.00 exposure.
Of these, you expect, based on probabilities to win 90% as you have written very OTM.
Now based on your returns, say you take in 7% in premiums [a generous return on capital based on a 90% probability] you see that @ $2000 risk per trade, your $14,000.00 in premiums is amortized by 7/100 failed trades. [not inclusive of brokerage] On a 90% probability, 10 trades is the probable failure rate............you are almost guaranteed to lose??
Have a bad month, with 20 trades going south and suddenly writing starts looking decidedly uncomfortable.
jog on
d998
In Options if we look at some of the facts surrounding the use of *probabilities*.
When using *probabilities* to trade Options, probabilities are based on the Law of Large Numbers, thus, for probabilities to provide you with a theoretical edge, you must have a large number of trades.
Many trades = at least 100 positions.
If each credit spread [hedged position] exposes you to $2000 risk the;
100 postions = $200,000.00 exposure.
Of these, you expect, based on probabilities to win 90% as you have written very OTM.
Now based on your returns, say you take in 7% in premiums [a generous return on capital based on a 90% probability] you see that @ $2000 risk per trade, your $14,000.00 in premiums is amortized by 7/100 failed trades. [not inclusive of brokerage] On a 90% probability, 10 trades is the probable failure rate............you are almost guaranteed to lose??
Have a bad month, with 20 trades going south and suddenly writing starts looking decidedly uncomfortable.
jog on
d998