Add training workflow, datasets, and runbook
This commit is contained in:
@@ -0,0 +1,34 @@
|
||||
Furthermore, she realizes that her outlook may be wrong: Johnson &
|
||||
Johnson may decline. She may have to close the position early—maybe for
|
||||
a profit, maybe for a loss. Stacie also needs to study her greeks. Exhibit 5.5
|
||||
shows the greeks for this trade.
|
||||
EXHIBIT 5.5 Greeks for short Johnson & Johnson 65 put (per contract).
|
||||
Delta 0.65
|
||||
Gamma−0.15
|
||||
Theta 0.02
|
||||
Vega −0.07
|
||||
The first item to note is the delta. This position has a directional bias. This
|
||||
bias can work for or against her. With a positive 0.65 delta per contract, this
|
||||
position has a directional sensitivity equivalent to being long around 650
|
||||
shares of the stock. That’s the delta × 100 shares × 10 contracts.
|
||||
Stacie’s trade is not just a bullish version of Brendan’s. Partly because of
|
||||
the size of the delta, it’s different—specific directional bias aside. First, she
|
||||
will handle her trade differently if it is profitable.
|
||||
For example, if over the next week or so Johnson & Johnson rises $1,
|
||||
positive delta and negative gamma will have a net favorable effect on
|
||||
Stacie’s profitability. Theta is small in comparison and won’t have too much
|
||||
of an effect. Delta/gamma will account for a decrease in the put’s
|
||||
theoretical value of about $0.73. That’s the estimated average delta times
|
||||
the stock move, or [0.65 + (–0.15/2)] × 1.00.
|
||||
Stacie’s actual profit would likely be less than 0.73 because of the bid-ask
|
||||
spread. Stacie must account for the fact that the bid-ask is 0.05 wide (1.75–
|
||||
1.80). Because Stacie would buy to close this position, she should consider
|
||||
the 0.73 price change relative to the 1.80 offer, not the 1.75 trade price—
|
||||
that is, she factors in a nickel of slippage. Thus, she calculates, that the puts
|
||||
will be offered at 1.07 (that’s 1.80 − 0.73) when the stock is at $65. That is
|
||||
a gain of $0.68.
|
||||
In this scenario, Stacie should consider the Would I Do It Now? rule to
|
||||
guide her decision as to whether to take her profit early or hold the position
|
||||
until expiration. Is she happy being short ten 65 puts at 1.07 with Johnson
|
||||
& Johnson at $65? The premium is lower now. The anticipated move has
|
||||
already occurred, and she still has 28 days left in the option that could allow
|
||||
Reference in New Issue
Block a user