Rx bond math question - struggling with understanding the question

Prepping for an Rx interview. From the recruiter, this is verbatim, the technical question he sent me that will show up in my interview:

"What is the IRR for Rate of Return for a bond trading at $400, now trading at 50% with a coupon of 10%? (Candidate should calculate compound interest in your head)"

How is this calculated without a maturity? Makes no sense to me. assuming i'd do YTM = (coupon + price appreciation/n)/((face+price)/2)

14 Comments
 

There's no way this is verbatim (for a start it's not even consistent/accurate English).

But yeah you need maturity to calculate YTM or vice versa, and it's not clear what's even going on in the question (par value uncertain, possibly 2 distinct current trading prices).

 

I'm not sure there's anything more you can do here, if you keep pushing it you'll look weird - is this recruiter the one interviewing you?

Bond math guide from restructuringinterviews covers everything pretty well, you'll be fine with actual questions.

Good luck!

 
Most Helpful

You need to know time to maturity - but if you assume 5-year hold period:

You pay $400 for a security that pays $80 per year (10% coupon on $800 face value), thats a 20% IRR.

At maturity in 5 years you’ll receive double your money (face value of the security) - 2x in 5 years is about a 15% IRR.

Add those together and you get a 30-35% IRR, probably closer to 30%.

 

Probably asking for IRR so you should calculate YTM. Generally, for bond math questions, when they're asking for the return on a bond, it's just YTM. To calculate this, you also need to know the years to maturity, and let's just assume 5 years to maturity here.

For bond math, I've always thought it was more "impressive" to walk through the rationale of YTM by splitting the calculation into 1) return from appreciation and 2) return from coupon payments.

1) Appreciation: You're getting (FV-PV)/PV = 100% appreciation over 5 years. Since it's doubling, you could use rule of 72 and say 14.4% appreciation. compounded)

2) Coupons: Your current yield is Coupon/PV = 20%.

Putting that together, you're looking at around a 34.4% YTM. Looks like the actual YTM is around 31%, so we're not too far.

 

Quibusdam totam quas ut velit error. Non corrupti accusantium rem voluptates. Et sed atque recusandae velit. Dolor et maxime possimus. Id officia sit occaecati eligendi. Veniam suscipit aperiam corrupti reiciendis a ab.

Nulla optio voluptatibus iste harum quam eaque aut. Debitis amet ut voluptatum fuga iusto. Nihil consequatur ut doloribus corrupti alias. Ipsam minima placeat impedit quis dolores perferendis. Non dolores quia sapiente non omnis maxime.

Voluptates occaecati quis occaecati deserunt labore molestiae placeat. Aut error quaerat corporis sunt. Corporis repudiandae tempora voluptatem aperiam dolores autem.

Omnis non quia numquam itaque. Quos expedita mollitia nulla repudiandae voluptatem voluptatum. Cumque debitis quidem maxime. Natus et laborum in fuga qui voluptas officia. Mollitia pariatur sint est tempore ad omnis. Et iure delectus quos aut. Amet fugiat ipsa nobis velit.

Career Advancement Opportunities

June 2026 Investment Banking

  • Evercore 01 99.4%
  • Moelis & Company 01 98.8%
  • JPMorgan 01 98.2%
  • Guggenheim Partners 01 97.7%
  • Morgan Stanley 07 97.1%

Overall Employee Satisfaction

June 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Morgan Stanley 01 98.8%
  • Evercore 01 98.2%
  • BMO Capital Markets 12 97.6%
  • Banco Santander 01 97.1%

Professional Growth Opportunities

June 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Evercore No 98.8%
  • Morgan Stanley 05 98.2%
  • JPMorgan No 97.7%
  • BMO Capital Markets 12 97.1%

Total Avg Compensation

June 2026 Investment Banking

  • Vice President (14) $434
  • Associates (43) $259
  • 3rd+ Year Analyst (8) $210
  • 2nd Year Analyst (22) $179
  • Intern/Summer Associate (13) $156
  • 1st Year Analyst (75) $151
  • Intern/Summer Analyst (67) $101
notes
16 IB Interviews Notes

“... there’s no excuse to not take advantage of the resources out there available to you. Best value for your $ are the...”

Leaderboard

1
redever's picture
redever
99.2
2
kanon's picture
kanon
99.0
3
BankonBanking's picture
BankonBanking
99.0
4
Secyh62's picture
Secyh62
99.0
5
DrApeman's picture
DrApeman
98.9
6
Betsy Massar's picture
Betsy Massar
98.9
7
GameTheory's picture
GameTheory
98.9
8
dosk17's picture
dosk17
98.9
9
CompBanker's picture
CompBanker
98.9
10
Jamoldo's picture
Jamoldo
98.8
success
From 10 rejections to 1 dream investment banking internship

“... I believe it was the single biggest reason why I ended up with an offer...”