Early Assignment of Covered Calls Position in Agnico Eagle Mines Ltd.

I was notified via email early this morning by my broker (Schwab) that the two Agnico Eagle Mines Ltd. (ticker AEM) September 5th, 2025 Call options were exercised yesterday.  Agnico Eagle's stock price increased from $132.71 when this position was established to $144.17 at yesterday's market close.  The original $2.08 time value in the Calls when the position was established had declined on yesterday's market close to only $0.03.  So, with seven days remaining until the Sept 5th, 2025 options expiration date, the owner of these Calls exercised their option to buy the 200 shares at the $128.00 strike price in order to receive next Tuesday's $.40 per share ex-dividend.  Although I will not receive the ex-dividend, I am pleased with the +40.1% annualized-return-on-investment (aroi) result achieved since it slightly exceeds the maximum aroi that might have been achieved if this position instead had remained in-the-money and would therefore be assigned on the September 5th options expiration date.   

The post when this Agnico Eagle Covered Calls position was originally established is here.  

As detailed below, the return-on-investment result for this Agnico Eagle Mines Ltd. Covered Calls position was +1.6% absolute return in 15 days (equivalent to a +40.1% annualized return-on-investment).

Agnico Eagle Mines Ltd. (AEM) -- Covered Calls Position Closed by Early Assignment
The buy/write transaction was:
8/18/2025 Bought 200 Agnico Eagle shares @ $132.71
8/18/2025 Sold 2 Agnico Eagle 9/5/2025 $128.00 Call options @ $6.79
Note: the Implied Volatility of the Call options was 32.8 when this buy/write transaction was executed.
8/29/2025 Two Agnico Eagle Call options were exercised on the last business day prior to next Tuesday's September 2nd, 2025 ex-dividend date, so the Call options expired and the 200 AEM shares were sold at the $128.00 strike price.

The overall performance results (including commissions) for this Agnico Eagle Mines Ltd. Covered Calls position are as follows:
Covered Calls Cost Basis: $25,185.34
= ($132.71 - $6.79) * 200 shares + $1.34 commission

Net Profit Components:
(a) Options Income: +$1,356.66
= ($6.79 * 200 shares) - $1.34 commission
(b) Dividend Income (Two Call options exercised early on August 29th, the last business day prior to the September 2nd ex-dividend date): +$0.00

(c) Capital Appreciation (Early assignment of Agnico Eagle Call options): -$942.00

+($128.00 strike price - $132.71 stock purchase price) * 200 shares

Total Net Profit: +$414.66

= (+$1,356.66 options income + $0.00 dividend income - $942.00 capital appreciation)

Absolute Return-on-Investment: +1.6%

= +$414.66/$25,185.34

Annualized Return-on-Investment: +40.1%

= (+$414.66/$25,185.34) * (365/15 days)