Using Client Information for the Lawyer’s Own Benefit: California Rule 1.8(b)
A lawyer learns, in strict confidence, that her client is about to announce a corporate acquisition. She never tells a soul. She just quietly buys the stock before the announcement. Has she broken any rule if she never disclosed anything to anyone?
Yes — and this is the trap that Rule 1.8(b) exists to catch. California Bar Exam candidates often assume confidentiality analysis begins and ends with non-disclosure. Rule 1.8(b) proves that assumption wrong.
What Does Rule 1.8(b) Prohibit?
A lawyer may not use information relating to the representation to the client’s disadvantage without the client’s informed consent, even where the use never involves disclosing that information to anyone else. This is the doctrinal hook for insider-trading-style misuse of confidential client information.
Rule 1.8(b) sits on top of the general duty of confidentiality in Rule 1.6, but it targets a different act. Rule 1.6 bars disclosure; Rule 1.8(b) bars use to the client’s detriment, whether or not the information is ever shared with a third party. California and the ABA are substantially aligned on this rule.
The Classic Fact Pattern: Trading on the Deal
The paradigm violation looks like this: a lawyer learns confidential, market-moving information during a representation — a planned tender offer, an undisclosed merger, a pending settlement — and personally trades on it before the information becomes public. This is both a Rule 1.8(b) violation and potential criminal insider trading or securities fraud under Section 10(b) of the Securities Exchange Act and SEC Rule 10b-5.
Worked Example: The Biotech Tender Offer
Alice represents a biotech client negotiating a strategic partnership. During due diligence, she learns — in strict confidence — that her client plans a confidential tender offer for all publicly traded shares of Chipco Corporation within the month. Before the offer is announced, Alice buys 10,000 shares of Chipco at the market price.
Two weeks later, the tender offer is announced, the stock jumps $100 per share, and Alice pockets a $1 million profit. Alice’s purchase also drove up the price her own client now has to pay to complete the acquisition. This is a textbook Rule 1.8(b) violation — the rule is broken by the exploitation itself, independent of whether the information was ever disclosed to a third party — and Alice has likely also committed federal securities fraud.
The Rule Reaches Indirect Use, Too
Rule 1.8(b) applies whether the lawyer trades personally or funnels the benefit through someone else. If a lawyer learns of an impending acquisition and tips off a family member — “buy Target Company stock soon; it’s going to be worth a lot more” — without explaining why, the rule is still violated. The lawyer used client information, via a proxy, to generate a personal benefit at the client’s expense, even though the lawyer never traded and never explicitly revealed the confidential facts.
When Is Information No Longer Protected?
Not everything a lawyer learns during a representation is protected forever. Information that is publicly available, or that never was confidential (well-known industry practice discussed openly, for instance), falls outside Rule 1.8(b) even if the lawyer first encountered it while representing a client. The rule only reaches information “relating to the representation” that was genuinely confidential — a lawyer who later uses non-confidential knowledge picked up along the way, even years afterward, does not violate the rule.
| Scenario | Rule 1.8(b) Violation? |
|---|---|
| Lawyer personally trades on confidential merger information before it’s public | Yes |
| Lawyer tips a relative to trade, without disclosing the underlying facts | Yes |
| Lawyer later uses publicly known industry practices learned during a past engagement | No |
| Lawyer discloses confidential information to a third party who profits, but the lawyer gains nothing | Analyzed under Rule 1.6 (confidentiality), not 1.8(b) |
Common Mistakes
- Assuming that not disclosing information automatically protects the lawyer — Rule 1.8(b) bars use, not just disclosure.
- Believing that tipping a third party escapes the rule because the lawyer didn’t personally trade.
- Treating everything learned during representation as confidential when some of it may be public or non-sensitive.
- Failing to separately flag the personal-interest conflict this creates under the broader conflicts-of-interest framework.
- Forgetting that obtaining the client’s informed consent can cure what would otherwise be a violation.
FAQ
Does Rule 1.8(b) require that the client actually lose money?
No. The violation is the unauthorized use of confidential information to the client’s disadvantage or the lawyer’s advantage — a completed financial loss to the client is not a required element, though it is common in the classic fact patterns.
Is trading on client information also a crime?
It can be. Trading on material, non-public information learned through a representation can constitute securities fraud and insider trading under federal law, layered on top of the Rule 1.8(b) ethics violation.
Can a client consent to let the lawyer use confidential information for personal benefit?
Yes, with informed consent. Absent that consent, using the information to the client’s disadvantage — directly or through a third party — violates the rule.
Key Takeaways
- Rule 1.8(b) bars using confidential client information to the client’s disadvantage, even without disclosure to anyone.
- It is distinct from Rule 1.6, which governs disclosure rather than use.
- Trading through a proxy, like a tipped family member, still violates the rule.
- Only genuinely confidential information “relating to the representation” is covered — public knowledge is not.
- Insider trading on client deal information can trigger both discipline and federal securities-fraud liability.
This article is educational and is not legal advice. Consult a licensed California attorney about your situation.
Related guides
- conflicts of interest
- attorney media rights in litigation
- California client trust accounts
- attorney discipline vs. malpractice