IRR Floor of 15% Non-Negotiable
Books Teaching This Pattern
Evidence

Lifelong Investor (translated)
Yoshiaki Murakami · 2 highlights
“Even with conservative estimates, the criterion is for the IRR to be above 15%. It might sound like I'm seeking a very high return, but IRR is not a multiplier of how many times the investment amount can be recovered. Since returns received during the investment period are also considered in the calculation, shorter-term projects tend to have higher figures.”
“I make the final decision on whether to invest or not from three points that include risk assessment with "expected value" and IRR. Economically, the degree of risk in an investment should correspond to the degree of return, with higher risks bringing higher returns (high risk, high return) and lower risks bringing lower returns (low risk, low return).”

Limping on Water
Philip Beuth, K.C. Schulberg · 2 highlights
“Chiseled into our heads every year at our management meeting was Murphy’s reminder that we could make honest mistakes, or miss our budgets, but if we put the company, or ourselves, in disrepute, there was no second chance at Capital Cities.”
“Be sure to pick a business you enjoy. Do not go for the biggest buck, but go where you will be happiest, because if you are happy, you are successful And do yourself a favor, get yourself involved in your community. Put something back. When you do well, do some good also. You will feel better about yourself. As my father used to say, do not do anything that would cost you a good night’s sleep! And finally, in your business career, don’t do anything that is ethically questionable. You will lose more than you could ever gain.””