How to react to panic during market making interview?

I recently had a final interview with Options MM for quant trader role, and the market making question was as follows:

Make a market on number of prime number btw 1 and 1000, spread being 50(which I don't understand why, but just stick to it)

-> I divided 10 by 6 & 7, expecting average amount of prime number btw unit of 10 being around 1.5. According to this logic, the bid-ask should be 143-166, so I just gave 130 - 180. 

The trader lifted me at 180. So I thought the actual number must be larger than my ask offer. So gave another offer for 180 at 230. Then he lifted me at 230 again. I felt quite strange but thought maybe the actual value would be a slightly more than 230, so if offer 230 at 280, we would find the expected value. Surprisingly he again lifted me at 280. Well after 2 more rounds I ended up being lifted at 380. 

I never expected this kind of situation, where I was certain that trader acted irrationally.(The true value was 168, so its really irrational to have lifted me at much higher price, right?)

Was I thinking wrong about this situation? or would there have been some special meaning for this behavior? 

Would really appreciate the feedback:)

Thanks in advance!

1 Comments
 
Most Helpful

Consequuntur sint exercitationem delectus velit consequatur eveniet. Aut sapiente rerum adipisci. Corporis voluptates saepe laborum voluptas rerum fuga sed. Velit a placeat omnis qui dolore. Eum tempora cumque id consequatur.

Laborum deleniti eum aperiam ex. Voluptatem et dolor natus aut reiciendis. Aut assumenda repellat reprehenderit neque et maxime.

Et aperiam voluptatem et perspiciatis quia. Error eaque voluptas aut. Dolorem non atque quia officiis.

Et est a aliquid quam autem voluptatem iusto. Quo dolor porro omnis maiores voluptate labore porro. Incidunt earum voluptatem nam. Quasi eos et rerum omnis itaque.

Career Advancement Opportunities

August 2026 Investment Banking

  • Evercore 01 99.4%
  • Moelis & Company 01 98.9%
  • JPMorgan 01 98.3%
  • Morgan Stanley 08 97.8%
  • Goldman Sachs 02 97.2%

Overall Employee Satisfaction

August 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Evercore No 98.9%
  • Morgan Stanley 01 98.3%
  • Banco Santander 02 97.8%
  • BMO Capital Markets 12 97.2%

Professional Growth Opportunities

August 2026 Investment Banking

  • Evercore 01 99.4%
  • Moelis & Company 01 98.9%
  • Morgan Stanley 06 98.3%
  • Goldman Sachs 01 97.8%
  • JPMorgan 01 97.2%

Total Avg Compensation

August 2026 Investment Banking

  • Vice President (16) $429
  • Associates (47) $258
  • 3rd+ Year Analyst (8) $210
  • 2nd Year Analyst (25) $178
  • Intern/Summer Associate (14) $159
  • 1st Year Analyst (83) $151
  • Intern/Summer Analyst (74) $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
dosk17's picture
dosk17
98.9
6
CompBanker's picture
CompBanker
98.9
7
GameTheory's picture
GameTheory
98.9
8
DrApeman's picture
DrApeman
98.9
9
Betsy Massar's picture
Betsy Massar
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...”