Early Assignment of Covered Calls Position in Oshkosh Corporation

I was notified by Schwab early this morning that the two Oshkosh Corporation May 17th, 2024 Call options were exercised yesterday.  Because the Oshkosh stock price increased from $113.16 when this position was established to $118.70 at yesterday's market close, the original $1.38 time value in the Calls when the position was established had declined on yesterday's market close to $0.20, so (with one week remaining until the May 17th options expiration date), the owner of these Calls exercised their option to buy the 200 shares at the $110.00 strike price in order to receive today's $.46 per share ex-dividend.  I am pleased with the +46.1% annualized-return-on-investment (aroi) result achieved today by early assignment since it exceeds the maximum +36.2% aroi that might have been achieved if this position was instead assigned on its May 17th, 2024 options expiration date.   

The post when this Oshkosh Corporation Covered Calls position was originally established is here.  As detailed below, the return-on-investment result for this Oshkosh Covered Calls position was +1.3% absolute return in 10 days (equivalent to a +46.1% annualized return-on-investment).

Oshkosh Corporation (OSK) -- Covered Calls Position Closed Out by Early Assignment
The buy/write transaction was:
4/30/2024 Bought 200 Oshkosh Corporation shares @ $113.16.
4/30/2024 Sold 2 OSK 5/17/2024 $110.00 Call options @ $4.54 per share.
Note: Implied Volatility (IV) of the Call options was at 22.6 when this position was transacted which, as preferred, is above the current VIX of 15.5.
5/10/2024 Two Oshkosh Corp. Calls were exercised on the day prior to the May 10th, 2024 ex-dividend date, so the Calls expired and the 200 Oshkosh shares were sold at the $110.00 strike price.

The overall performance results (including commissions) for this Oshkosh Covered Calls position are as follows:
Covered Calls Net Investment: $21,725.34
= ($113.16 - $4.54) * 200 shares + $1.34 commission

Net Profit Components:
(a) Options Income: +$906.66
= ($4.54 * 200 shares) - $1.34 commission
(b) Dividend Income (OSK Call options exercised early on May 9th, 2024, the last business day prior to the May 10th ex-div date): +$0.00

(c) Capital Appreciation: -$632.00

+($110.00 stock sales price (i.e. strike price) - $113.16 stock purchase price) * 200 shares

Total Net Profit: +$274.66

= (+$906.66 options income +$0.00 dividend income -$632.00 capital appreciation)

Absolute Return-on-Investment: +1.3%

= +$274.66/$21,725.34

Annualized Return-on-Investment: +46.1%

= (+$274.66/$21,725.34) * (365/10 days)