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Flashcard 149626455

Tags

#bonds #duration #finance

Question

Macaulay duration is a weighted average [...] until repayment (measured in [...])

Answer

time until repayments, e.g. coupons and principal (measured in units of time such as years)

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Macaulay duration is a weighted average time until repayment (measured in units of time such as years)

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Bond duration - Wikipedia, the free encyclopedia
the asset. This gives the well-known relation between Macaulay duration and modified duration quoted above. It should be remembered that, even though Macaulay duration and modified duration are closely related, they are conceptually distinct. <span>Macaulay duration is a weighted average time until repayment (measured in units of time such as years) while modified duration is a price sensitivity measure when the price is treated as a function of yield, the percentage change in price with respect to yield. Units[edit] For modified du

Flashcard 149626971

Tags

#bonds #duration #finance

Question

Fisher-Weil duration is a refinement of Macaulay’s duration which takes into account the [...].

Answer

term structure of interest rates

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Fisher-Weil duration is a refinement of Macaulay’s duration which takes into account the term structure of interest rates.

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Bond duration - Wikipedia, the free encyclopedia
a 15-year bond with a Macaulay duration of 7 years would have a Modified duration of roughly 7% and would fall approximately 7% in value if the interest rate increased by one percentage point (say from 7% to 8%).[6] Fisher-Weil Duration[edit] <span>Fisher-Weil duration is a refinement of Macaulay’s duration which takes into account the term structure of interest rates.Fisher-Weil duration calculates the present values of the relevant cashflows (more strictly) by using the zero coupon yield for each respective maturity.[7] Key Rate Duration[edit] Key r

Flashcard 149626986

Tags

#bonds #finance #yield-to-maturity

Question

Yield to maturity is simply the [...]at which the sum of all future cash flows from the bond (coupons and principal) is equal to the price of the bond.

Answer

discount rate

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Yield to maturity is simply the discount rate at which the sum of all future cash flows from the bond (coupons and principal) is equal to the price of the bond.

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Yield to maturity - Wikipedia, the free encyclopedia
nternal rate of return (IRR, overall interest rate) earned by an investor who buys the bond today at the market price, assuming that the bond will be held until maturity, and that all coupon and principal payments will be made on schedule.[1] <span>Yield to maturity is simply the discount rate at which the sum of all future cash flows from the bond (coupons and principal) is equal to the price of the bond. The YTM is often given in terms of Annual Percentage Rate (A.P.R.), but more usually market convention is followed. In a number of major markets (such as gilts) the convention is to quot

Flashcard 149626993

Tags

#bonds #finance #yield-to-maturity

Question

Yield to maturity is simply the discount rate at which the [...].

Answer

sum of all future cash flows from the bond (coupons and principal) is equal to the price of the bond

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Yield to maturity is simply the discount rate at which the sum of all future cash flows from the bond (coupons and principal) is equal to the price of the bond.

Original toplevel document

Flashcard 149627000

Tags

#bonds #finance #yield-to-maturity

Question

Yield to maturity is simply the [...].

Answer

discount rate at which the sum of all future cash flows from the bond (coupons and principal) is equal to the price of the bond

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Yield to maturity is simply the discount rate at which the sum of all future cash flows from the bond (coupons and principal) is equal to the price of the bond.

Original toplevel document

Flashcard 149627007

Tags

#bloch-effective-java-2ed #java #java-generics

Question

What is the name of the property of arrays that allow us to cast Long[] to Object[], like here?


// Fails at runtime!
Object[] objectArray = new Long[1];
objectArray[0] = "I don't fit in"; // Throws ArrayStoreException

Answer

arrays are covariant

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Flashcard 149627018

Tags

#bloch-effective-java-2ed #java #java-generics

Question

What is the name of the property of parametrized List that causes compilation error (unlike in arrays)?


// Won't compile!
List<Object> ol = new ArrayList<Long>(); // Incompatible types
ol.add("I don't fit in");

Answer

generics are invariant

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Article 149627029

#bloch-effective-java-2ed #java #p119

Generics are implemented by erasure. This means that they enforce their type constraints only at compile time and discard (or erase) their element type information at runtime. By contrast, array types are reified, so they can enforce their type at runtime (e.g. if you try to store a String into an array of Long, you’ll get an ArrayStoreException).

Flashcard 149627046

Tags

#bloch-effective-java-2ed #java #java-generics

Question

Generics are implemented by [...]. This means that they enforce their type constraints only at compile time and [...] their element type information at runtime. By contrast, array types are reified, so they can enforce their type at runtime (e.g. if you try to store a String into an array of Long, you’ll get an ArrayStoreException).

Answer

erasure / discard (or erase)

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Flashcard 149627057

Tags

#bloch-effective-java-2ed #java #java-generics

Question

Generics are implemented by erasure. This means that they enforce their type constraints only at compile time and discard (or erase) their element type information at runtime. By contrast, array types are [...], so they can enforce their type at runtime (e.g. if you try to store a String into an array of Long, you’ll get an ArrayStoreException).

Answer

reified

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Generics are implemented by erasure. This means that they enforce their type constraints only at compile time and discard (or erase) their element type information at runtime. By contrast, array types are reified, so they can enforce their type at runtime (e.g. if you try to store a String into an array of Long, you’ll get an ArrayStoreException).

Flashcard 149627064

Tags

#bloch-effective-java-2ed #java #java-generics

Question

Is it legal to create an array of generic type, e.g. new List<E>[] ?

Answer

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Flashcard 149627082

Tags

#bloch-effective-java-2ed #java #java-generics

Question

Is it legal to create array of a parametrized type new List<String>[] ?

Answer

No.

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Flashcard 149627093

Tags

#bloch-effective-java-2ed #java #java-generics

Question

Is it legal to create array of a type parameter new E[] ?

Answer

No.

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Flashcard 149627104

Tags

#bloch-effective-java-2ed #java #java-generics

Question

Give an example how type safety could be compromised if it was legal to create arrays of parametrized types (but it is not legal).

Answer

You could create an array of lists of strings:
List<String>[] stringLists = new List<String>[1]; // this part is not legal and wouldn't compile
Because arrays are covariant, you can store the array into a variable of Object[] type and then store an element of type List<Integer> (or really List<anything>) as an element of the original array without causing ArrayStoreException because at runtime List<String> and List<Integer> are simply lists
So, we are in trouble - List<Integer> is stored where the compiler thought it was List<String>

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Edited, memorised or added to reading queue

on 02-Aug-2014 (Sat)

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