Early Assignment of Covered Calls Position in Suncor Energy Inc.

This morning I was notified that the five Suncor Energy (ticker SU) December 15th, 2023 $32.00 Call options were exercised yesterday.  The original $.32 time value in the Calls when the position was established had declined on yesterday's market close to $0.18 and the owner of these Suncor Calls exercised their option to buy the 500 shares at the $32.00 strike price in order to receive today's approximate $.398 per share ex-dividend.  I am pleased for this early assignment despite losing the opportunity to capture the dividend since the +40.1% annualized-return-on-investment (aroi) achieved by early assignment is greater than the +34.1% aroi that might have been achieved if this position was instead assigned on its Dec. 15th options expiration date.   

The post when this Suncor Energy Covered Calls position was originally established is here.  As detailed below, the return-on-investment result for this Suncor Energy Covered Calls position was +1.0% absolute return in 9 days (equivalent to a +40.1% annualized return-on-investment).  

Suncor Energy Inc. (SU) -- New Covered Calls Position
The simultaneous buy/write transactions was as follows:
11/21/2023 Bought 500 shares of Suncor stock @ $33.10 per share 
11/21/2023 Sold 5 Suncor December 15th, 2023 $32.00 Call options @ $1.42 per share
11/29/2023 Suncor Energy Call options owner exercised their five Call options, so the Covered Calls position was closed out early. The five SU Call options expired worthless and the 500 Suncor shares were sold at the $32.00 strike price.

The overall performance results (including commissions) are as follows:
Covered Calls Cost Basis: $15,843.35
= ($33.10 - $1.42) * 500 shares + $3.35 commission

Net Profit Components:
(a) Options Income: +$706.65
= ($1.42 * 500 shares) - $3.35 commission
(b) Dividend Income (Suncor stock assigned on the November 30th ex-dividend date): $0.00
(c) Capital Appreciation (Suncor stock assigned on the Nov 30th ex-dividend date): -$550.00
= ($32.00 - $33.10) * 500 shares

Net Profit: +$156.65
= (+$706.65 options income +$0.00 dividend income - $550.00 capital appreciation)

 Absolute Return-on-Investment: +1.0%
= +$156.65/$15,843.35
Equivalent Annualized Return-on-Investment: +40.1%
= (+$156.65/$15,843.35) * (365/9 days)