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In finance, a high-yield bond (non-investment-grade bond, speculative-grade bond, or junk bond) is a bond that is rated below investment grade. These bonds have a higher risk of default or other adverse credit events, but typically pay higher yields than better quality bonds in order to make them attractive to investors. Sometimes the company can provide new bonds as a part of yield which can only be redeemed after its expiry or maturity. ==Risk== The holder of any debt is subject to interest rate risk and credit risk, inflationary risk, currency risk, duration risk, convexity risk, repayment of principal risk, streaming income risk, liquidity risk, default risk, maturity risk, reinvestment risk, market risk, political risk, and taxation adjustment risk. Interest rate risk refers to the risk of the market value of a bond changing due to changes in the structure or level of interest rates or credit spreads or risk premiums. The credit risk of a high-yield bond refers to the probability and probable loss upon a credit event (i.e., the obligor defaults on scheduled payments or files for bankruptcy, or the bond is restructured), or a credit quality change is issued by a rating agency including Fitch, Moody's, or Standard & Poors. A credit rating agency attempts to describe the risk with a credit rating such as AAA. In North America, the five major agencies are Standard and Poor's, Moody's, Fitch Ratings, Dominion Bond Rating Service and A.M. Best. Bonds in other countries may be rated by US rating agencies or by local credit rating agencies. Rating scales vary; the most popular scale uses (in order of increasing risk) ratings of AAA, AA, A, BBB, BB, B, CCC, CC, C, with the additional rating D for debt already in arrears. Government bonds and bonds issued by government-sponsored enterprises (GSEs) are often considered to be in a zero-risk category above AAA; and categories like AA and A may sometimes be split into finer subdivisions like "AA−" or "AA+". Bonds rated BBB− and higher are called investment grade bonds. Bonds rated lower than investment grade on their date of issue are called speculative grade bonds, or colloquially as "junk" bonds. The lower-rated debt typically offers a higher yield, making speculative bonds attractive investment vehicles for certain types of portfolios and strategies. Many pension funds and other investors (banks, insurance companies), however, are prohibited in their by-laws from investing in bonds which have ratings below a particular level. As a result, the lower-rated securities have a different investor base than investment-grade bonds. The value of speculative bonds is affected to a higher degree than investment grade bonds by the possibility of default. For example, in a recession interest rates may drop, and the drop in interest rates tends to increase the value of investment grade bonds; however, a recession tends to increase the possibility of default in speculative-grade bonds. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「High-yield debt」の詳細全文を読む スポンサード リンク
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