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Find the optimal covered call for any stock or ETF.

CAPAlpha lays out every strike and expiry as one clear board: yield, return versus buy-and-hold, the odds of assignment, and risk-adjusted performance. Sell calls with data instead of guesswork.

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app.capalpha.ch — AAPL

AAPL · covered calls · Yield

10%

54.1%

36.2%

24.0%

15.8%

10.2%

6.8%

4.4%

3.0%

2.0%

1.4%

42.6%

31.7%

23.7%

18.1%

13.0%

9.8%

7.2%

5.4%

4.1%

3.0%

38.1%

30.4%

24.6%

19.7%

15.7%

12.7%

9.9%

8.1%

6.5%

5.2%

30.9%

26.6%

22.3%

18.8%

15.7%

13.7%

11.3%

9.4%

8.0%

6.8%

25.0%

21.9%

19.4%

16.9%

14.9%

13.2%

11.4%

9.9%

8.8%

7.7%

21.1%

19.4%

17.7%

15.5%

14.2%

12.8%

11.5%

10.3%

9.3%

8.4%

15.5%

14.4%

13.7%

12.5%

11.8%

10.9%

10.1%

9.5%

8.9%

8.2%

← nearer the moneyfurther OTM →

Real AAPL data. Tap Yield, Return, vs B&H, or Sortino to re-rank the board, or switch the strike axis from Moneyness to Delta targets.

Runs in your browser. No install.

Roll history

See exactly where you'd get called away.

Trace any strategy roll by roll across years of history. Watch the strike ratchet up as the stock climbs, spot every point the shares would have been called away, and see how it stacked up against simply holding.

✓ Stock price against the rolled call strike
✓ Every assignment marked on the timeline
✓ Outcome versus buy-and-hold for the whole run

roll history

AAPL · roll history

87 rolls · vs Buy & Hold +4.0%

Stock priceCall strike (rolled)Called away (5)scroll to zoom · drag to pan

Real option data

Priced on real option data.

Pull the actual option chain for any past date, with real bids, asks, last prices and implied vol, and see the premium a call would truly have fetched that day.

✓ Historical chains for any date and expiry
✓ Real bid / ask / last and implied vol
✓ Live chain overlaid on the model view

option chain

AAPL calls · exp 17 Janas of 12 Mar 2024

Strike	Bid	Ask	Last	IV
185	6.15	6.35	6.25	28.4%
190ATM	4.05	4.20	4.12	27.1%
195	2.48	2.60	2.54	26.3%
200	1.36	1.45	1.41	25.8%
205	0.71	0.78	0.74	25.5%

IV by delta

Know when premium is rich before you sell.

Volatility has a price, and it is not always a fair one. This chart puts five years of it side by side: the implied vol call buyers paid at every delta target, and the volatility the stock actually delivered. The gap between the two shows when premium was expensive and when it was thin.

✓ IV tracked per delta target, Δ0.40 down to Δ0.10
✓ ATM IV against realized volatility: rich or cheap?
✓ Call-skew tilt shows when the upside is being bid

iv by delta

AAPL · implied volatility by delta · 1M tenor

Vol premium (ATM − RV): Call-skew tilt (Δ0.10 − ATM):

My Positions

Track the calls you actually sold.

Log your shares and the calls written against them, and CAPAlpha takes it from there: every open call is marked at its live mid, expired calls settle themselves as assigned or expired worthless, and your whole book is charted against simply holding the shares.

✓ Live P&L and net position delta, the exposure your calls sold away
✓ Calls settle automatically at expiry, with a review step to match your broker
✓ Email heads-up when a call needs review or enters the roll-decision week

my positions

My Positions · Open positionsmarked live

Name	Qty	Δ	P&L	Value
AAPL	100	0.62	+1,240	23,410
195 C · 17 Janexpires this week	−1	−0.38	+186	−254
MSFT	100	0.71	−380	41,890
430 C · expiredneeds review	−1	—	+512	0

2 open calls1 to review

Watchlist

Every name you follow, one glance away.

Keep the stocks you write calls on, or are thinking about, in one list that lives right next to your positions. Every name carries the numbers a call seller cares about, and when you're ready to write, the ranked views surface the next candidate.

✓ Follow any stock or ETF, whether you hold a position or not
✓ Seller's metrics beside every name: ATM IV and vol premium
✓ Ranked views to surface the next candidate, one click to its chart

watchlist

Watchlist5 names

Name	Last	Day	ATM IV	Vol prem
AAPL	229.10	+1.2%	26.9%	+4.5%
NVDA	176.42	+2.8%	48.2%	+8.7%
MSFT	504.66	−0.4%	24.1%	+2.3%
TSLA	333.87	−1.6%	52.6%	−2.5%
SPY	644.28	+0.5%	15.4%	+1.1%

Click a name to chart it

Every number explained

Metrics you can actually act on.

Yield Annualized yield

The call premium you collect, expressed as a yearly rate, so a weekly and a one-year call sit on the same scale.

Edge vs Buy & Hold

The bottom line: did selling the call beat simply owning the shares over the same stretch?

Odds Assignment rate

How often the stock finished above your strike, so the shares would have been called away.

Risk Sortino ratio

Return per unit of downside risk. It ignores upside swings, so steady income scores well. Higher is better.

Find the optimal covered call for any stock or ETF.

One board. Every strike and expiry.

See exactly where you'd get called away.

Priced on real option data.

Know when premium is rich before you sell.

Track the calls you actually sold.

Every name you follow, one glance away.

Metrics you can actually act on.

Screen faster

Price smarter

Decide with confidence

Sell your next call with data.