The disposition effect is an anomaly discovered in behavioral finance. It relates to the tendency of investors to sell assets that have increased in value, while keeping assets that have dropped in value. Hersh Shefrin and Meir Statman identified and named the effect in their 1985 paper, which found that people dislike losing significantly more than they enjoy winning. The disposition effect has been described as one of the foremost vigorous actualities around individual investors because investors will hold stocks that have lost value yet sell stocks that have gained value." In 1979, Daniel Kahneman and Amos Tversky traced the cause of the disposition effect to the so-called "prospect theory". The prospect theory proposes that when an individual is presented with two equal choices, one having possible gains and the other with possible losses, the individual is more likely to opt for the former choice even though both would yield the same economic result. The disposition effect can be minimized by a mental approach called "".

Sam Johnson (born 6 May 1993) is a Liberian footballer who play for Malaysia Super League club Sabah as a forward.

The 2019–2021 edition of the FIDE Grand Prix is a series of four chess tournaments exclusively for women, which will determine two players to play in the Women's Candidates Chess Championship in 2021. The winner of the Candidate's tournament will play a 12-game match against the world champion, in the Women's World Chess Championship 2022. This is the fifth cycle of the tournament series. Number one woman player Hou Yifan, who won the first three editions of the Grand Prix, was unable to play due to studies at Oxford University.

An acoustic-electric guitar is an acoustic guitar fitted with a magnetic or piezoelectric pickup, or a microphone. They are used in a variety of music genres where the sound of an acoustic guitar is desired but more volume is required, especially during live performances. The design is distinct from a semi-acoustic guitar, which is an electric guitar with the addition of sound chambers within the guitar body.

Sifan Hassan (Oromo: Siifan Hassan; born 1 January 1993) is an Ethiopian-Dutch middle- and long-distance runner. She won two gold medals at the 2019 World Championships, in the 1500 metres and 10,000 metres events, becoming the only athlete (male or female) in history to win both events at a single World Championships or Olympic Games. Hassan was the 2016 1500m indoor world champion. At the 2015 World Championships in Athletics, she won a bronze medal in the 1500m, following that with a bronze medal in the 5000m in the 2017 championships. Hassan is the world record holder for both the 5 km road race (womens only race) and the mile, both set in 2019, as well as the one hour run, set in 2020. She held the world record for the women's 10,000 metres for two days in June 2021. In 2021, Hassan won the gold medal in the 5000 metres event at the Tokyo Olympics.
Sifan Hassan (Oromo: Siifan Hassan; born 1 January 1993) is an Ethiopian-Dutch middle- and long-distance runner. She won two gold medals at the 2019 World Championships, in the 1500 metres and 10,000 metres events, becoming the only athlete (male or female) in history to win both events at a single World Championships or Olympic Games.

An acoustic-electric guitar is an acoustic guitar fitted with a magnetic or piezoelectric pickup, or a microphone. They are used in a variety of music genres where the sound of an acoustic guitar is desired but more volume is required, especially during live performances. The design is distinct from a semi-acoustic guitar, which is an electric guitar with the addition of sound chambers within the guitar body. Usually, acoustic-electric guitars are fitted with piezoelectric pickups, requiring a preamplifier incorporated into the guitar body to amplify the signal before it travels to the main guitar amplifier. These preamps may also come with an integrated tuner and tone controls of varying types; equalizers with up to six frequency bands may be used.