June 26th, 2020 Options Expiration -- Financial Select Sector SPDR Fund Covered Calls Position Assigned

The June 26th, 2020 $22.50 Covered Calls position in the Financial Select Sector SPDR Fund expired in-the-money, so the 400 shares of XLF were assigned (i.e. sold) at the $22.50 strike price.  As detailed below, the return-on-investment (ROI) result was  +1.5% absolute return (equivalent to +55.9% annualized return-on-investment for the 10 days holding period).

Financial Select Sector SPDR Fund (XLF) -- Covered Calls Position Assigned at Expiration
The transactions were:

06/17/2020 Bought 400 Financial Select Sector SPDR Fund shares @ $24.31
06/17/2020 Sold 4 XLF 6/26/2020 $22.50 Call options @ $2.00 per share
Note: a simultaneous buy/write transaction was executed.  Open Interest in these Calls was 719 contracts and their Implied Volatility was 49.5 when this position was transacted.
06/22/2020 Ex-dividend of $.1516 per share x 400 shares
06/26/2020 Four Financial Select Sector SPDR Fund Call options expired in-the-money so 400 XLF shares sold at $22.50 strike price.
Note: the XLF share price closed in-the-money at $22.58.
 
The overall performance results (including commissions) for this Financial Select Sector SPDR Fund Covered Calls position were as follows:
Covered Calls Cost Basis: $8,926.68
= ($24.31 - $2.00) * 400 shares + $2.68 commission

Net Profit Components:
(a) Options Income: +$800.00
= ($2.00 * 400 shares)
(b) Dividend Income: +$60.64
= ($.1516 dividend per share x 400 shares)

(c) Capital Appreciation (XLF shares assigned at $22.50 strike price at options expiration): -$724.00
+($22.50 - $24.31) * 400 shares

Total Net Profit (XLF shares assigned at $22.50 at June 26th, 2020 expiration): +$136.64

= (+$800.00 options income +$60.64 dividend income - $724.00 capital appreciation)

Absolute Return: +1.5%

= +$136.64/$8,926.68

Annualized Return (If XLF shares assigned at $22.50 at June 26th, 2020 expiration): +55.9%

= (+$136.64/$8,926.68)*(365/10 days)