Rules of Acquisition
The Rules of Acquisition were the sacred precepts upon which all Ferengi society was based. They were first written by Gint, the first Grand Nagus. In the mid-22nd century there were 173 rules, and by the 24th century there were 285. (; ; ) In theory, "[e]very Ferengi business transaction is governed by [these rules] to ensure a fair and honest deal for all parties concerned." ()

In 2370, the Ferengi government was debating an amendment to the Rules. ()

In 2371, Grand Nagus Zek authored a short-lived revised edition of the Rules, after having his state of mind altered by the Bajoran Prophets. It contained rules very different in character from preceding versions, instead promoting honesty and charity. Upon recovering, Zek ordered the destruction of all copies of this work. ()

Official rules

Unofficial rules 

The following sayings were either not given a number, not explicitly stated to be a Rule, or were not part of the generally-accepted Rules by the Ferengi Commerce Authority.

Notes

Appendices

Background information 
The Rules of Acquisition were invented by executive producer-writer Ira Steven Behr at the beginning of  (beginning with ) () and were mentioned throughout the Star Trek spinoffs.

In the first draft script of , the eighty-first or seventy-first Rule of Acquisition (Rom wasn't sure which) was said to be, "What's good for the boss is good for the worker."

Similarly, in the first draft script of , the 153rd rule was stated to be, "People will buy anything… especially junk."

The authors of the Star Trek Encyclopedia (4th ed., vol. 1, p. 267) identified "Exploitation begins at home.", from the episode , as one of these rules.

Apocrypha 
Deep Space Nine writers Ira Steven Behr and Robert Hewitt Wolfe expanded upon the Rules and Ferengi culture in the non-canon books, The Ferengi Rules of Acquisition and Legends of the Ferengi. A number of additional rules have also appeared within Pocket Deep Space Nine titles.

The following rules are derived from non-canon sources:

External links 
 
 

de:Erwerbsregeln der Ferengi
es:Reglas de adquisición
fr:Règles de l'acquisition ferengies
ja:金儲けの秘訣
nl:Regels van acquisitie
pl:Zasady zaboru
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Ferenginar