John C Nicholson, an authority in equity finance, repo, stock lending & borrowing, RWA

John C Nicholson is an expert witness and legal consultant and an authority in equity finance, stock loan, funding, repo, balance sheet usage, capital costs and financial markets in general.

Mr. Nicholson began his career at Chase in 1984 working in their swaps business and within a year moved to Tokyo to set up their swaps business in Asia. He later moved to Lehman Brothers while in Tokyo, eventually running their fixed income and FX derivatives businesses for Asia. He later moved to NY and helped set up their reinsurance business.

In 2003 he transitioned to repo, running Lehman’s structured, credit, and emerging markets repo businesses globally. In 2005, he added responsibility for the US equity financing business, stock loan, and prime.

In 2008, he moved to Barclays and was responsible for the equity financing businesses globally.

In 2010, he moved to Citi. At Citi he was responsible for three streams of business. He managed the client facing business including P&L and risk for their prime client businesses including delta one. Simultaneously he was responsible for all of stock loan and funding across the global equity businesses. Concurrently he managed Financial Resource Management for equities where he was responsible for the liquidity management of equities, the balance sheet and RWA management post trade across the equity construct.

John graduated from Dartmouth in 1982 with a major in history.

Registrations / memberships

Areas of expertise

  • Stock loan, equity finance, balance sheet management: prime brokerage, repo trading, stock lending and borrowing, swaps, synthetic equity, derivatives, capital costs, balance sheet usage, RWA, funding, inventory optimization, equities and fixed income.
  • Supported practice areas: trading losses, post-mortems, financial frauds, white-collar crime, collusion, market manipulation, investigations, enforcement, alternative dispute resolution, FINRA.

Litigation support

Mr. Nicholson’s services are available to attorneys representing plaintiff and defendant and include consulting, written reports, deposition, arbitration, and trial testimony as needed.


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