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Find the optimal covered call or cash-secured put 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 options with data instead of guesswork.

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app.capalpha.ch — AAPL

AAPL · covered calls · Yield

10%

45.8%

31.8%

22.0%

16.8%

12.9%

9.8%

7.7%

6.2%

5.0%

4.1%

37.5%

28.4%

20.9%

16.5%

13.0%

10.3%

8.3%

6.7%

5.5%

4.5%

33.0%

26.2%

20.6%

16.1%

13.5%

10.6%

8.8%

7.4%

6.0%

5.0%

29.3%

23.4%

18.8%

15.3%

12.8%

10.3%

8.6%

7.2%

5.9%

5.0%

23.2%

20.4%

18.0%

15.3%

14.1%

11.9%

10.6%

9.3%

7.9%

7.0%

19.6%

18.3%

16.0%

14.2%

12.7%

11.4%

10.2%

9.1%

7.8%

6.9%

15.4%

14.8%

13.4%

12.5%

11.7%

10.7%

10.1%

9.3%

8.4%

7.9%

12.2%

11.8%

11.1%

10.6%

10.2%

9.6%

9.3%

8.9%

8.3%

8.1%

← nearer the moneyfurther OTM →

Real AAPL data. Switch between Calls and Puts, tap Yield, Return, vs B&H, or Sortino to re-rank the board, or move the strike axis from Moneyness to Delta targets.

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Roll history

See exactly where you'd be called away, or put the shares.

Pick any cell on the board and trace it roll by roll across five years of history. Watch the strike ratchet with the stock, spot every point the shares would have been called away or put to you, and see how the run stacked up against simply holding.

✓ Stock price against the rolled strike: calls above spot, puts below
✓ Every assignment marked on the timeline
✓ Outcome versus buy-and-hold for the whole run, and yield on collateral for puts

roll history — AAPL

$355.00 call · Oct 9 · 2W / 5% OTM (18 days)

Annualized yield

13.0%

Strategy return

17.6%

vs Buy & Hold

-0.8%

Assignment rate

18.5%

Live yield (18d)

0.5%

Live (last close): Mid $1.72 · $355 call · Oct 9

Stock priceCall strike (rolled)Called (24)scroll to zoom · drag to pan

Expected move

Know how far the market thinks it can move.

Before you pick a strike, see the range the options market is pricing in for any horizon, from one day to one year, straight from the live at-the-money straddle. Then check it against five years of history: how often did the stock actually move further than the band?

✓ ±% and ±$ band for nine horizons, from the live straddle
✓ Implied versus realized move, roll by roll, with every breach coloured
✓ Read the term structure at a glance: contango or backwardation

expected move — AAPL

AAPL · expected move · 1M

±5.5%±$18.48$320.51 – $357.46exp Oct 23 (32d)

Implied ±1σ moveRealized, inside the bandRealized, breached

±2.4%

±$8.10

±3.3%

±$11.23

±5.5%

±$18.48

±10.0%

±$34.00

±14.8%

±$50.20

±21.8%

±$73.83

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 or put 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 option buyers paid at every delta target, on the call wing and the put wing, 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, calls and puts
✓ ATM IV against realized volatility: rich or cheap?
✓ Call-skew and put-skew tilt show which wing 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 and puts you actually sold.

Log your shares and the calls written against them, or the puts you sold against cash, and CAPAlpha takes it from there: every open option is marked at its live mid, expired ones 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 across calls, puts and shares
✓ Options settle automatically at expiry, with a review step to match your broker
✓ Email heads-up when a position 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
AMD	—	0.24	+92	15,000
150 P · 21 Nov	−1	0.24	+92	−310

2 open calls · 1 open put1 to review

Watchlist

Every name you follow, one glance away.

Keep the stocks you sell options on, or are thinking about, in one list that lives right next to your positions. Every name carries the numbers a premium 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 premium you collect, expressed as a yearly rate, so a weekly and a one-year option sit on the same scale. For a put, it is measured on the cash collateral, not the stock price.

Edge vs Buy & Hold

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

Odds Assignment rate

How often the stock finished past your strike: above it for a call, so the shares would have been called away, or below it for a put, so you would have been put the shares.

Risk Sortino ratio

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

Cash Collateral

The cash set aside to back one short put: 100 times the strike. Put yield and return are measured on it, so a put and a call are never compared number for number.

Range Expected move

The one-sigma move the options market prices in for a horizon, read from the live at-the-money straddle, and checked against the moves the stock actually made.

Find the optimal covered call or cash-secured put for any stock or ETF.

One board. Every strike and expiry. Calls or puts.

See exactly where you'd be called away, or put the shares.

Know how far the market thinks it can move.

Priced on real option data.

Know when premium is rich before you sell.

Track the calls and puts 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 option with data.