Early Assignment of Covered Calls Position in U.S. Bancorp

I was notified this morning that the five U.S. Bancorp (ticker USB) April 12th, 2024 $40.00 Call options were exercised yesterday.  Because the U.S. Bancorp stock price increased from $42.15 when this position was established to $43.53 at yesterday's market close, the original $.29 time value in the Calls when the position was established had declined on yesterday's market close to $0.00, so the owner of these USB Calls exercised their option to buy the 500 shares at the $40.00 strike price in order to receive today's $.49 per share ex-dividend.  The +32.5% annualized-return-on-investment (aroi) achieved by early assignment is slightly greater than the +29.6% aroi that might have been achieved if this position was instead assigned on its April 12th options expiration date.   

The post when this U.S. Bancorp Covered Calls position was originally established is here.  As detailed below, the return-on-investment result for this U.S. Bancorp Covered Calls position was +0.7% absolute return in 8 days (equivalent to a +32.5% annualized return-on-investment).

U.S. Bancorp (USB) -- Early Assignment of Covered Calls Position
The buy/write transaction was:
3/19/2024 Bought 500 U.S. Bancorp shares @ $42.15.
3/19/2024 Sold 5 USB 4/12/2024 $40.00 Call options @ $2.44 per share.
Note: Implied Volatility (IV) of the Call options was at 23.1 when this position was transacted which, as I prefer, is above the current VIX of 13.8.   
3/27/2024 USB Call options owner exercised their five Call options, so the Covered Calls position was closed out early. The five GPC Call options expired worthless and the 500 U.S. Bancorp shares were sold at the $40.00 strike price.

The overall performance results (including commissions) for this U.S. Bancorp Covered Calls position are as follows:
Covered Calls Net Investment: $19,858.35
= ($42.15 - $2.44) * 500 shares + $3.35 commission

Net Profit Components:
(a) Options Income: +$1,216.65
= ($2.44 * 500 shares) - $3.35 commission
(b) Dividend Income (U.S. Bancorp Call options exercised early on March 26th, 2024, the last business day prior to the March 27th ex-div date): +$0.00

(c) Capital Appreciation: -$1,075.00

+($40.00 strike price - $42.15 stock purchase price) * 500 shares

Total Net Profit: +$141.65

= (+$1,216.65 options income +$0.00 dividend income -$1,075.00 capital appreciation)

Absolute Return-on-Investment: +0.7%

= +$141.65/$19,858.35

Annualized Return-on-Investment: +32.5%

= (+$141.65/$19,858.35) * (365/8 days)