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2002issue C031-3

Covered-call premium budgets and calendar-style rolls

A covered call sold against owned shares can be split into intrinsic, time, and volatility pieces, written in the nearest month, and replaced once most of that premium has decayed. Editorial view: treat the leftover cushion as a disposable budget and check whether it still matches the stock's current regime.

  • A covered call is a short call sold against stock already owned so assignment can be settled with those shares; a short call without the shares is treated as unhedged and open-ended.
  • Option premium analysis splits the quote into an intrinsic piece, a time-to-expiration piece, and a volatility piece that can fall even when the underlying stock rises.
  • Time decay typically speeds up as expiration nears, so the nearest listed month is the default tenor for a written call and the monthly window to adjust the overlay.
  • A roll is considered once about 75 percent of the original premium has decayed; a calendar-style roll-out keeps the strike and replaces the near-expiry short call with the next month, and can be combined with a roll up or roll down.
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Current trackOptions calendar spread30 readingsCovered call writing53 readingsOption premium analysis103 readings

A short call against shares already owned

A covered call is a short call sold against stock already owned so assignment can be settled with the existing shares. A short call written without those shares is treated as unhedged and open-ended.

Call moneyness is defined by strike versus the current stock price. A lower strike is in-the-money, an equal strike is at-the-money, and a higher strike is out-of-the-money.

How the quoted premium is split

Option premium analysis splits the quote into an intrinsic piece, a time-to-expiration piece, and a volatility piece. The volatility piece can fall even when the underlying stock rises.

Time decay in the premium typically speeds up as expiration nears. The nearest listed month is presented as the default tenor for a written call and as a monthly window to adjust the overlay.

Outlook and strike choice

A constructive outlook maps to an out-of-the-money write that keeps more stock appreciation. A neutral outlook maps to an at-the-money or in-the-money write that collects a larger premium cushion.

When a roll is considered

A roll is defined as buying back the short call and selling a replacement with a higher strike, a lower strike, or a later expiration. It is considered once about 75 percent of the original premium has decayed and most of the remaining downside offset is gone.

Rolling up buys back the written call and sells a higher-strike replacement after the stock has risen. Rolling down buys back the written call and sells a lower-strike replacement after the stock has fallen. Rolling out buys back the written call and sells a longer-dated replacement, often the next listed month.

A calendar-style roll-out keeps the same strike and replaces a near-expiry short call with the next-month short call after most of the remaining premium has eroded. That tenor shift can be combined with a roll up or a roll down.

Worked paths from the first write

Worked examples start from a stock bought at 100 that first sold a 30-day 100-strike call for 2.45. They show a roll-up after a rise to 105, a same-strike roll-out while the stock is unchanged, and a roll-down after a decline to 95.

Commissions, slippage, and volatility changes are omitted from the arithmetic.

Net P/L of three rolls from one $100 covered write

All three paths start from the same first write: stock bought at $100 and the 30-day $100 call sold for $2.45. Twenty days later the article’s cash-flow totals are +$3.65 after rolling up on a rise to $105, +$4.70 after rolling out while the stock is unchanged, and −$1.85 after rolling down on a drop to $95. A trader should see leftover premium as a disposable budget: the same starting credit leaves very different cushions once the stock’s regime has changed.
All three paths start from the same first write: stock bought at $100 and the 30-day $100 call sold for $2.45. Twenty days later the article’s cash-flow totals are +$3.65 after rolling up on a rise to $105, +$4.70 after rolling out while the stock is unchanged, and −$1.85 after rolling down on a drop to $95. A trader should see leftover premium as a disposable budget: the same starting credit leaves very different cushions once the stock’s regime has changed.Hypothetical $100 stock · 30-day call rolled after 20 days

The source ignored commissions, slippage, and any rise in the volatility component after the large up or down move.

Educational research material, not investment advice. Historical source context does not establish present-day performance.
3 of 21 in the Options calendar spread track
20021-5 pp.Next on Options calendar spreadCalendar-spread construction from time decay and implied volatilityAn options calendar spread pairs the same type and strike across two expiration months so the position can exploit the difference in time value between those months.
All readings on this track · 21 readings
  1. 1994Competing-bid calendar spreads and implied volatility
  2. 2001Calendar spreads as range overlays with wing repairs
  3. 2002Covered-call premium budgets and calendar-style rolls
  4. 2002Calendar-spread construction from time decay and implied volatility
  5. 2003Calendar ratio backspread construction for range and breakout regimes
  6. 2005Read the implied-volatility regime before calendar-spread assignment
  7. 2005Constructing calendars and straddles around implied volatility
  8. 2005Short option coverage through calendars, rolls, and expiration
  9. 2006Calendar spread expiration, assignment and time skew
  10. 2008The two clocks that close a calendar or a stock-plus-put
  11. 2010Cheap back-month implied volatility is a regime question, not a shopping rule
  12. 2010Calendar-spread assignment as a volatility regime shift
  13. 2010Uncapped collar overlays and earnings-week short calendars
  14. 2011Sequencing verticals, straddles, and calendars as construction tests
  15. 2012Executing conversion and ratio calendar option packages
  16. 2015Near-expiry options on new-crop grain futures
  17. 2018Calendar spreads as range and volatility regime trades
  18. 2019A directional put calendar after a failed resistance breakout
  19. 2019Sizing short-option risk with calendar puts
  20. 2019Limited-risk reversal construction
  21. 2020Covered-call writing versus a calendar call diagonal
By fieldOptions and volatility435 readingsBy year2002145 readings
All 30 readings tagged Options calendar spread
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