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A book containing references, alphabetically arranged, to the contents of a series or collection of documents or volumes; or a section (normally at the end) of a single volume or set of volumes containing such references to its contents.

Statistical indexes are also used to track or measure changes in the economy (for example, the Consumer Price Index) and movement in stock markets (for example, Standard & Poor's Index). Such indexes are usually keyed to a base year, month, or other period of comparison.

In mortgage financing, the term is used to determine adjustable-rate mortgage (ARM) interest rates after the discount period ends. Common indexes for ARMs are one-year Treasury Securities and the national average cost of funds to savings and loan associations.

References in periodicals archive ?
Brig Falak Naz said ISI headquarter is located exactly on road.
In the first few months after Baghdadi announced the formation of ISIS, its relationship with JN in Syria was not always clear.
Calida added that making Mindanao its center in Southeast Asia is part of ISIS' plan.
ISIS is seen as a rival of the Taliban in the region.
ISIS apparently has up to 31,100 fighters still active in Iraq and Syria, an alarming number that is close to previous estimate of the group's peak.
"You're seeing groups from all corners of the world motivated by the same bloody and deadly ISIS ideology, using the same sort of techniques targeting innocent men, women and children."
Taliban leadership's plea fell on deaf ears and intense fighting broke out between the two groups in Nangarhar Province, where ISIS managed to gain a foothold for the first time.
"These are obviously major blows to ISIS," says Hassan Hassan of the Tahrir Institute for Middle East Policy in Washington, D.C.
In addition to the ISIS militants, there are around 50,000 civilians left in the city, and officials fear that ISIS will use them as human shields.
At times the repetition in the book can be helpful, as unfamiliar readers will feel lost from the proliferation and splintering of various militant groups, along with names that will resemble one another, from ISIS' leader and self-proclaimed Caliph, Abu Bakr al-Baghdadi to Abu Omar al-Baghdadi (d.
Sky News recently showed some of 22,000 documents on Assad's ties to ISIS dating years.
Finally, with U.S and Western officials repeatedly telling the media we must deprive ISIS of its main sources of income and choke off its funding, why is ISIS still producing oil and the Assad regime is still buying it?