劉同學(xué)
2024-07-29 14:22I Spread 優(yōu)點(diǎn)這兩條怎么理解?
所屬:CFA Level III > Fixed-Income Portfolio Management 視頻位置 相關(guān)試題
來(lái)源: 視頻位置 相關(guān)試題
1個(gè)回答
Evian, CFA助教
2024-08-08 16:57
該回答已被題主采納
ヾ(?°?°?)??你好同學(xué),
提前總結(jié)一下:
1.Advantage的第一個(gè)黑點(diǎn),因?yàn)镮-spread是YTM和swap rate軋差,YTM代表固定利率融資成本,swap rate代表浮動(dòng)利率融資成本,兩個(gè)軋差就是個(gè)對(duì)比誰(shuí)高誰(shuí)低誰(shuí)更劃算。
2.第二個(gè)黑點(diǎn),I-spread具有期限匹配的特點(diǎn),于是對(duì)久期和持有收益率衡量起來(lái)都有幫助。
具體原版書(shū)內(nèi)容理解:
The I-spread (interpolated spread) uses interest rate swaps as the benchmark.
Recall that swap rates are derived using short-term lending or market reference rates (MRRs) rather than default-risk-free rates, and unlike government bonds, they are quoted across all maturities.
Short-term MRR were historically survey-based Libor rates and are transitioning to transaction-based, secured overnight funding rates.
I-spread 使用利率互換(interest rate swaps)作為基準(zhǔn)。
回想一下,互換利率是使用短期貸款或市場(chǎng)參考利率(MRR)而不是無(wú)違約風(fēng)險(xiǎn)利率得出的,與政府債券不同(例如0-3年的3年期債券),互換合約對(duì)應(yīng)的多個(gè)時(shí)間段的利率,所有到期日都有報(bào)價(jià),例如0-1,0-2,0-3,0-4時(shí)間段。
短期MRR,它是基于調(diào)查的倫敦銀行同業(yè)拆借利率Libor過(guò)度,然后到目前正在向基于交易的有擔(dān)保隔夜融資利率。
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追答
The spread over an MRR-based benchmark can be interpreted as a relative rather than absolute credit risk measure for a given bond issuer. An issuer might use the MRR spread to determine the relative cost of fixed-rate versus floating-rate borrowing alternatives, while an investor can use the I-spread to compare pricing more readily across issuers and maturities
I-spread=YTM-Swap rate,期限匹配
Swap rate是用MRR(設(shè)為一個(gè)基準(zhǔn))算出來(lái)的,用債券的YTM減去Swap rate(也是一個(gè)基準(zhǔn))
那么I-spread可以看成是基于MRR基準(zhǔn)的利差,是相對(duì)而言的,和benchmark比較,不是自己和自己比較absolute credit risk measure,這個(gè)是站在bond issuer 發(fā)行人角度思考的
由于YTM對(duì)應(yīng)的固定利率發(fā)行債券的成本,I-spread對(duì)應(yīng)的是浮動(dòng)利率發(fā)行債券的成本
所以發(fā)行人可以使用I-spread來(lái)確定固定利率與浮動(dòng)利率借款相對(duì)而言哪個(gè)更劃算
同樣的邏輯,投資者考慮的收益,而不是發(fā)行成本,投資者可以使用I-spread更容易地去比較發(fā)行人它發(fā)行(不同到期時(shí)間)債券的定價(jià) -
追答
Swap benchmarks have the added benefit of directly measuring all-in bond YTMs with an instrument that can be used both as a duration hedge and to measure carry return more accurately for a leveraged position. While the I-spread addresses the maturity mismatch of bonds and benchmarks as raised earlier, it incorporates yield levels using a point on the curve to estimate a risky bond’s yield spread rather than the term structure of interest rates and is limited to option-free bonds as a credit risk measure.
Swap benchmark還有額外的好處,是針對(duì)加杠桿的頭寸,在久期對(duì)沖和持有收益方面,可以更加準(zhǔn)確且直接衡量債券的YTM。
原因是久期涉及到了時(shí)間,持有收益也涉及到了時(shí)間。I-spread它是期限匹配的一個(gè)利差,YTM和Swap rate期限匹配,這種情況下更準(zhǔn)確。這個(gè)是相對(duì)而言,相對(duì)的是利率的期限結(jié)構(gòu)term structure,term structure是期限不匹配的,也就是在I-spread之前學(xué)過(guò)的yield spread,期限不匹配。
I-spread有個(gè)缺點(diǎn),那就是在衡量信用風(fēng)險(xiǎn)時(shí),僅限于衡量無(wú)內(nèi)嵌期權(quán)的債券。
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