One fundamental property that pairs trading requires is the instruments have to be cointegrated in order to ensure a connection between two FX currency pairs. Definition (Cointegration): An n-dimensional time series yt is cointegrated if the linear combination 1y1t + â¦ + n Ynt of the component variables is stationary.
Please note that after 31st December 2011, all U.S. nationals expect to visit Sri Lanka have to apply visa online through ETA (Electronic Travel Authorization) system. A processing fee of $30 will be charged from the applicants. The passport should be valid for at least six months from the date the visa is to be issued. 2  Business visa applications should accompany a letter from the sponsoring agency in Sri Lanka, a letter from the employing company in US and a copy of onward â return air ticket and travel itinerary.
ENTRY/EXIT REQUIREMENTS: U.S. citizen tourists staying for fewer than 30 days do not require a visa, but must possess a passport and may be asked to show an onward/return ticket. Persons entering Thailand without a visa are allowed to stay in Thailand for 30 days per visit.The duration of stay in Thailand for persons who enter Thailand without a visa cannot exceed 90 days during any six-month period, counting from the date of first entry.est Answer: The passport you travel under will determine how many days you are allowed in for free at the airport if you are going as a tourist. Travelers with passports from the US, UK, Canadian and many EU countries will get a 30 day entry permit in their passports, sort of a visa on arrival.