Greeks (finance)
In mathematical finance, the Greeks are the quantities representing the sensitivity of the price of derivatives such as options to a change in underlying parameters on which the value of an instrument or portfolio of financial instruments is dependent. The name is used because the most common of these sensitivities are denoted by Greek letters (as are some other finance measures). Collectively these have also been called the risk sensitivities,risk measures or hedge parameters.
Use of the Greeks
The Greeks are vital tools in risk management. Each Greek measures the sensitivity of the value of a portfolio to a small change in a given underlying parameter, so that component risks may be treated in isolation, and the portfolio rebalanced accordingly to achieve a desired exposure; see for example delta hedging.
The Greeks in the Black–Scholes model are relatively easy to calculate, a desirable property of financial models, and are very useful for derivatives traders, especially those who seek to hedge their portfolios from adverse changes in market conditions. For this reason, those Greeks which are particularly useful for hedging—such as delta, theta, and vega—are well-defined for measuring changes in Price, Time and Volatility. Although rho is a primary input into the Black–Scholes model, the overall impact on the value of an option corresponding to changes in the risk-free interest rate is generally insignificant and therefore higher-order derivatives involving the risk-free interest rate are not common.
Lotna
Lotna is a Polish war film released in 1959 and directed by Andrzej Wajda.
Overview
This highly symbolic movie is both the director's tribute to the long and glorious history of the Polish cavalry, as well as a more ambiguous portrait of the passing of an era. Wajda was the son of a Polish Cavalry officer who was murdered by the Soviets during the Katyn massacre.
The horse Lotna represents the entire Romantic tradition in culture, a tradition that had a huge influence in the course of Polish history and the formation of Polish literature. Lotna is Wajda's meditation on the historical breaking point that was 1939, as well as a reflection on the ending of an entire era for literature and culture in Poland and in Europe as a whole. Writing of the film, Wajda states that it "held great hopes for him, perhaps more than any other." Sadly, Wajda came to think of Lotna "a failure as a film."
The film remains highly controversial, as Wajda includes a mythical scene in which Polish horsemen suicidally charge a unit of German tanks, an event that never actually happened.
Speed (Montgomery Gentry song)
"Speed" is a song written by Jeffrey Steele and Chris Wallin, and recorded by American country music duo Montgomery Gentry. It was released in December 2002 as the second single from their album My Town. The title from the cover of this single borrows its font from Speed Racer.
"She Couldn't Change Me" was included as a B-side.
Music video
The music video was directed by Trey Fanjoy. A young man trades his old truck for a car with speed as his truck just brings back memories of his ex-lover. He buys the car, then he drives the car really fast, but as he keeps seeing the memory of his ex-lover on the road, he jumps out of the car, and then he heads out running into the field. The duo is performing the song in the middle of a two-lane road at a night time setting.
Chart positions
"Speed" debuted at #57 on the U.S. Billboard Hot Country Songs for the week of December 28, 2002.
Year-end charts
References
External links
Speed (South Korean band)
Speed (Korean: 스피드; commonly stylized as SPEED) is a South Korean boy group formed by MBK Entertainment (formerly known as Core Contents Media) in 2012. The group was also formerly known as the "Male Unit" of Coed School until their agency announced that they were an independent group in 2013.
Speed was originally a six-member group composed of Kwanghaeng, Noori, Jungwoo, Taewoon, Sungmin, and Jongkook. In January 2012, they released their first song "Lovey-Dovey Plus." A few days after their first song release, Sejun joined the group. Following Kwanghaeng and Noori's withdrawal from the group in September 2012, Yuhwan and Taeha were added in October 2012. Speed officially debuted as a seven-member group with the release of their first single "It's Over" in January 2013. In March 2015, leader Taewoon left Speed to pursue a solo career. Yuhwan replaced Taewoon as Speed's leader and a new member, KI-O, was added in May 2015.
History
2011–2012: Co-Ed School Sub-Units, Formation, and Pre-debut Projects
Speed (1936 film)
Speed is a 1936 Metro-Goldwyn-Mayer action film starring James Stewart in his first starring role, and Wendy Barrie. Although only a low-budget "B" movie, the film was notable for its realistic cinematography by Lester White, incorporating scenes from the Indianapolis 500 race and on-location shooting at the Muroc dry lake bed, used for high-speed racing by "hot rodders" in the 1930s. Advance publicity trumpeted that Stewart drove the specially-prepared "Falcon" to 140 mph (230 km/h).
Plot
Auto mechanic Terry Martin (James Stewart), the chief car tester for Emery Motors in Detroit, is working on his own time to perfect a revolutionary design for a new carburetor. Automotive engineer Frank Lawson (Weldon Heyburn) is a rival for the attention of Jane Mitchell (Wendy Barrie), who has just been hired to work in the publicity department. Terry has little formal education and resents inferences that his knowledge of cars is inferior to that of the trained Lawson. He nearly loses his job when he makes a jealous spectacle of himself at a company dinner dance that Jane attends with Frank.
Speed (ride)
Speed is an amusement ride design produced by the Dutch company KMG.
It is commonly referred to as KMG Booster, due to its similarity with the Fabbri Booster ride.
It has become an extremely common ride on European travelling funfairs, particularly in the UK. This is due to a combination of the ride's spectacular visual impact, and its highly practical operation. The ride can be transported on only one trailer, and requires just three hours to build up.
Design and operation
The ride is primarily a 37-metre arm, connected midway to the main support of the ride. Two sets of two seats are mounted at the end of each arm, back to back. Each four-seat assembly can swing through 360 degrees.
The arm rotates at up to 13 revolutions per minute, producing an acceleration of 3.5 g on the riders.
