Yes, the terms strike price and exercise price are synonymous. Some traders will use one term over the other and may use the terms interchangeably, but their meanings are the same. Both terms are widely used in derivatives trading.

For listed options, strike prices are set by criteria established by the OCC or an exchange, typically with $2.50 distance for strikes below $25, $5 increments for those trading from $25 through $200, and $10 increments for strikes above $200. In general, the strikes will be wider for stocks with higher prices and with less liquidity or trading activity. New strikes may also be requested to be added by contacting the OCC or an exchange.


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Strike action, also called labor strike, labour strike, or simply strike, is a work stoppage caused by the mass refusal of employees to work. A strike usually takes place in response to employee grievances. Strikes became common during the Industrial Revolution, when mass labor became important in factories and mines. As striking became a more common practice, governments were often pushed to act (either by private business or by union workers). When government intervention occurred, it was rarely neutral or amicable. Early strikes were often deemed unlawful conspiracies or anti-competitive cartel action and many were subject to massive legal repression by state police, federal military power, and federal courts.[1] Many Western nations legalized striking under certain conditions in the late 19th and early 20th centuries.

Strikes are sometimes used to pressure governments to change policies. Occasionally, strikes destabilize the rule of a particular political party or ruler; in such cases, strikes are often part of a broader social movement taking the form of a campaign of civil resistance. Notable examples are the 1980 Gdask Shipyard and the 1981 Warning Strike led by Lech Wasa. These strikes were significant in the long campaign of civil resistance for political change in Poland, and were an important mobilizing effort that contributed to the fall of the Iron Curtain and the end of communist party rule in Eastern Europe.[2] Another example are the strikes that followed the Kapp Putsch which were organised by the USPD and the German Communist Party that resulted in the collapse of the Putsch.

The use of the English word "strike" to describe a work protest was first seen in 1768, when sailors, in support of demonstrations in London, "struck" or removed the topgallant sails of merchant ships at port, thus crippling the ships.[3][4][5]

The first historically certain account of strike action was towards the end of the 20th dynasty, under Pharaoh Ramses III in ancient Egypt on 14 November in 1152 BCE. The artisans of the Royal Necropolis at Deir el-Medina walked off their jobs because they had not been paid.[6][7] The Egyptian authorities raised the wages.

An early predecessor of the general strike may have been the secessio plebis in ancient Rome. In The Outline of History, H. G. Wells characterized this event as "the general strike of the plebeians; the plebeians seem to have invented the strike, which now makes its first appearance in history."[9] Their first strike occurred because they "saw with indignation their friends, who had often served the state bravely in the legions, thrown into chains and reduced to slavery at the demand of patrician creditors".[9]

As the 19th century progressed, strikes became a fixture of industrial relations across the industrialized world, as workers organized themselves to collectively bargain for better wages and standards with their employers. Karl Marx condemned the theory of Pierre-Joseph Proudhon criminalizing strike action in his work The Poverty of Philosophy.[14]

A recognition strike is an industrial strike implemented in order to force a particular employer or industry to recognize a trade union as the legitimate collective bargaining agent for a company's workers.[15][16][17] In 1949, their use in the United States was described as "a weapon used with varying results by labor for the last forty years or more". One example cited was the successful formation of the United Auto Workers.[18] They were more common prior to the advent of modern American labor law (including the National Labor Relations Act), which introduced processes legally compelling an employer to recognize the legitimacy of properly certified unions.[18][15]

Two examples include the U.S. Steel recognition strike of 1901, and the subsequent coal strike of 1902.[19] A 1936 study of strikes in the United States indicated that about one third of the total number of strikes between 1927 and 1928, and over 40 percent in 1929, were due to "demands for union recognition, closed shop, and protest against union discrimination and violation of union agreements".[20] A 1988 study of strike activity and unionization in non-union municipal police departments between 1972 and 1978 found that recognition strikes were carried out "primarily where bargaining laws [provided] little or no protection of bargaining rights."[21]

In 1937, there were 4,740 strikes in the United States.[22] This was the greatest strike wave in American labor history. The number of major strikes and lockouts in the U.S. fell by 97% from 381 in 1970 to 187 in 1980 to only 11 in 2010. Companies countered the threat of a strike by threatening to close or move a plant.[23][24]

The International Covenant on Economic, Social and Cultural Rights, adopted in 1967, ensures the right to strike in Article 8. The European Social Charter, adopted in 1961, also ensures the right to strike in Article 6.

In Britain in 1926 (the year of the general strike) about 9 workdays per worker were lost due to strikes. In 1979, the loss due to strikes was a little more than one day per worker. These are the extreme cases. In the 79 years following 1926, the number of workdays lost in Britain was less than 2 hours per year per worker. In the U.S., idleness due to strikes never exceeded one half of one percent of total working days in any year during the period 1948-2005; the average loss was 0.1% per year. Similarly, in Canada over the period 1980-2005, the annual number of work days lost due to strikes never exceeded one day per worker; on average over this period lost worktime due to strikes was about one-third of a day per worker. Although the data are not readily available for a broad sample of developed countries, the pattern described above seems quite general: days lost due to strikes amount to only a fraction of a day per worker per annum, on average, exceeding one day only in a few exceptional years.[26]

Since the 1990s, strike actions have generally further declined, a phenomenon that might be attributable to lower information costs (and thus more readily available access to information on economic rents) made possible by computerization and rising personal indebtedness, which increases the cost of job loss for striking workers.[26][27][28] In the United States, the number of workers involved in major work stoppages (including strikes and, less commonly, lockouts) that involved at least a thousand workers for at least one full shift generally declined from 1973 to 2017 (coinciding with a general decrease in overall union membership), before substantially increasing in 2018 and 2019.[29] In the 2018 and 2019 period, 3.1% of union members were involved in a work stoppage each year on average, these strikes also contained more workers than ever recorded with an average of 20,000 workers participating in each major work stoppage in 2018 and 2019.[29]

Most strikes are organized by labor unions during collective bargaining as a last resort. The object of collective bargaining is for the employer and the union to come to an agreement over wages, benefits, and working conditions. A collective bargaining agreement may include a clause (a contractual "no-strike clause") which prohibits the union from striking during the term of the agreement.[31] Under U.S. labor law, a strike in violation of a no-strike clause is not a protected concerted activity.[31]

The scope of a no-strike clause varies; generally, the U.S. courts and National Labor Relations Board have determined that a collective bargaining agreement's no-strike clause has the same scope as the agreement's arbitration clauses, such that "the union cannot strike over an arbitrable issue."[31] The U.S. Supreme Court held in Jacksonville Bulk Terminals Inc. v. International Longshoremen's Association (1982), a case involving the International Longshoremen's Association refusing to work with goods for export to the Soviet Union in protest against its invasion of Afghanistan, that a no-strike clause does not bar unions from refusing to work as a political protest (since that is not an "arbitrable" issue), although such activity may lead to damages for a secondary boycott.[31] Whether a no-strike clause applies to sympathy strikes depends on the context.[31] Some in the labor movement consider no-strike clauses to be an unnecessary detriment to unions in the collective bargaining process.[32]

Occasionally, workers decide to strike without the sanction of a labor union, either because the union refuses to endorse such a tactic, or because the workers involved are non-unionized. Strikes without formal union authorization are also known as wildcat strikes.

In many countries, wildcat strikes do not enjoy the same legal protections as recognized union strikes, and may result in penalties for the union members who participate, or for their union. The same often applies in the case of strikes conducted without an official ballot of the union membership, as is required in some countries such as the United Kingdom.

Another unconventional tactic is work-to-rule (also known as an Italian strike, in Italian: Sciopero bianco), in which workers perform their tasks exactly as they are required to but no better. For example, workers might follow all safety regulations in such a way that it impedes their productivity or they might refuse to work overtime. Such strikes may in some cases be a form of "partial strike" or "slowdown". 006ab0faaa

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