Halloween Effect & Halloween Costume

There are many popular Halloween 🧙🏻 activities (celebrated on 31/10) like attending Halloween costume parties, carving pumpkins into jack-o'-lanterns, lighting bonfires, divination games, visiting haunted attractions👻, telling scary stories, and watching horror-themed films.

Here I would like to talk about 2 things:
1) Halloween Effect 🎃

Halloween Effect (also known as Halloween Strategy or Halloween Indicator) is a market timing strategy. It is based on the hypothesis that stocks perform better from Oct. 31 (Halloween) to May 1 than the rest of the year. This strategy is closely related to the oft-repeated advice to "Sell in May and go away". An example of the Halloween effect for U.S. stocks was the periods from 1970 to 2017 and 1991 to 2017. It indicates that the return on the Standard & Poor’s 500 (S&P 500) is much higher from November through April than it is from May through October. See chart.

My friend is going to attend a Halloween party next week.

As a fan of anime and cosplay, she selected 4 costumes to purchase online:
A) Resident Evil Ada Wong

B) Demon Slayer Kanroji Mitsuri

C) Suicide Square Joker Dress

D) Ancient Hanfu

Please vote below which costume is your like and comment below to state your reason. Do suggest a costume for her if you select "Other".

Happy Halloween 👻🎃👹👺🧛🏻🧙🏻🎭