Kamgar v. Kamgar (In re Kamgar), 18 Cal. App. 5th 136

Background

Fred and Moira Kamgar were married; Fred managed most family finances and opened a TD Ameritrade account (Kamgar Trust) for options trading with Moira's agreement to deposit $2.5 million.
Fred obtained a portfolio margin upgrade (signing/representing Moira on paperwork), removed Moira's withdrawal-signature requirement, and secretly deposited an additional $8,188,605 of community funds into the account.
The account grew to a mid-2012 peak (roughly $16 million at one point) through leveraged Apple options trading, then collapsed by Jan 2013, leaving about $409,000; net community trading loss attributable to the undisclosed additional deposits was about $3,904,113 after some withdrawals.
Moira learned of the large undisclosed transfers only shortly before separation; trial court found she had only authorized Fred to risk $2.5 million and that Fred breached fiduciary duties by undisclosed transfers and reckless/grossly negligent management.
Trial court awarded Moira $1,952,056.50 (one-half of the ~$3.9 million loss). Fred appealed liability; Moira argued she was entitled to a larger award (half of the $16M peak). Court of Appeal affirmed.

Issues

Issue	Plaintiff's Argument (Moira)	Defendant's Argument (Fred)	Held
Whether Fred breached spousal fiduciary duties by undisclosed transfers and trading	Moira: Fred unilaterally transferred $8.19M beyond the agreed $2.5M and thus breached disclosure and fiduciary duties; she seeks half the loss/value	Fred: He was authorized to manage the account; no continuous disclosure duty; his trades were within his management authority and not a fiduciary breach	Court: Substantial evidence supports that Fred breached fiduciary duty by transferring additional community funds without disclosure; affirmed liability
Scope of disclosure duty when one spouse manages investments	Moira: Managing spouse must disclose material transactions; nondisclosure of transfers and risky concentration is a breach	Fred: Statutory management authority and practicalities of market mean no duty to continuously update or obtain express consent for each trade	Court: Family Code (incorporating Corp. Code §16403) imposes a duty to provide information reasonably required by the partnership agreement; here agreement limited risk to $2.5M, so undisclosed $8M transfers violated the duty
Remedy/valuation under Fam. Code §1101(g) for undisclosed asset transfers	Moira: Award should be based on asset’s highest value (half of ~$16M peak) because trading was a continuous breach and statute allows valuation at highest value	Fred: (implicit) remedy should not be tied to peak unrealized value; award should reflect actual loss due to breach	Court: Use of peak value over a continuing period is rejected based on statutory language and legislative history; court reasonably valued breach at date Fred transferred undisclosed funds and awarded half the community loss (~$1.95M)

Key Cases Cited

Castaneda v. Olsher, 41 Cal.4th 1205 (2007) (existence/scope of fiduciary duty is question of law reviewed de novo; factual findings reviewed for substantial evidence)
Baker v. Osborne Dev. Corp., 159 Cal.App.4th 884 (2008) (appellate review applies substantial-evidence standard to factual determinations supporting legal questions)
In re Marriage of Duffy, 91 Cal.App.4th 923 (2001) (breach of spousal fiduciary duty is a question of fact reviewed for substantial evidence)
In re Marriage of Schleich, 8 Cal.App.5th 267 (2017) (remedy for breach of fiduciary duty reviewed for abuse of discretion)
In re Marriage of Hokanson, 68 Cal.App.4th 987 (1998) (award for delay or managerial breach can be based on value at relevant date when court-ordered sale or prompt sale was at issue)
Martin v. PacifiCare of California, 198 Cal.App.4th 1390 (2011) (statutory interpretation principles: ascertain legislative intent; plain meaning governs)
People v. Wahidi, 222 Cal.App.4th 802 (2013) (committee materials may be consulted to understand legislative intent)