Net Credit = |
Call Premium + Put Premium |
Downside Protection = |
Net Credit ÷ Stock Price |
Max Risk = |
(Stock Price + Put Strike) - Net Credit (if Stock Drops to 0) |
Max Profit = |
Return if Assigned on Short Call where: |
% If Assnd (Call) = |
[Net Credit + Appreciation on Stock] ÷ [Stock Price - Net Credit + Put Strike] |
Where Appreciation on Stock = Call Strike - Stock Price
|
% If Assnd (Put) = |
[Net Credit - Depreciation on Stock] ÷ [Stock Price - Net Credit + Put Strike] |
Where Depreciation on Stock = Stock Price - Put Strike
|
% If Unchanged = |
Net Credit ÷ (Stock Price - Net Credit + Put Strike) |
* Break Even = |
Stock Price - Net Credit |
When the total Net Credit is less than the difference of Stock Price - Put Strike Price
|
--OR-- |
* Break Even = |
[{(Put Strike) - (Stock Price - Net Credit)} ÷ 2] + (Stock Price - Net Credit) |
If the total Net Credit is greater than the difference of Stock Price - Put Strike. The second Break Even calculation reflects the potential buy back cost of the Short Put if the stock drops. |
Example: |
Stock XYZ at $40.04 per share. |
|
Buy 100 shares XYZ at $40.04 |
|
Write (Sell) the MAY 42.5 Strike Call @ $1.15 |
|
Write (Sell) the MAY 37.5 Strike Put @ $1.10 |
Total Net Credit = |
($1.15) + ($1.10) = $2.25 |
Downside Protection = |
$2.25 ÷ $40.04 = 5.6% |
Max Risk = |
($40.04 + $37.50) - $2.25 = $75.65 (if Stock goes to $0) |
Max Profit = |
$2.25 + $2.46 = $4.71 |
% Return if Assigned (Call) = |
($2.25 + $2.46) ÷ ($40.04 - $2.25 + 37.5) = 6.2% |
% Return if Assigned (Put) = |
($2.25 - $2.54) ÷ ($40.04 - $2.25 + 37.5) = -0.38% |
% If Unchanged = |
$2.25 ÷ ($40.04 - $2.25 + 37.5) = 2.9% |
Break Even = |
$40.04 - $2.25 = $37.79 |
Since the Net Credit is less than (Stock Price - Put Strike), the first Break Even equation applies. If the Net Credit in this example was greater than (Stock Price - Put Strike), we would apply the second Break Even equation. |