Expert witness services related to financial markets 

Navesink International offers expert witness services for topics related to the financial markets, including

→ Equities, fixed income, commodities, cryptocurrencies

→ Trading, options & futures, complex securities

Quantitative and fundamental analysis, portfolio constructions, investment risks

→ Hedge funds, equity finance, prime brokerage

Market manipulation, trading losses, tax arbitrage

We have both affiliated experts and a large network of experts able to cover a swath of topics and cases. We have a proven capacity to find uniquely qualified talents by drawing upon our industry network, rich of many thousands of experienced industry professionals.

For instance, we sourced expertise for cases centering on

Standards of custody agreements for a hedge fund trading tax liens,

Cost of capital and RWA calculations associated with stock loans,

Transaction cost analysis for cryptocurrency execution venues.

Gontran de Quillacq, the Managing Partner of Navesink International, is both a trading floor veteran and an expert witness / legal consultant.

He is a recognized authority in equity and index options, VIX, futures, swaps, trading, derivatives, structured products, complex securities, portfolio management, mathematical finance, quantitative investments, and strategy research in the wider segment of alternative investments and hedge funds.

He has supported securities lawsuits and arbitrations involving losses, risks, frauds, manipulations, and wrongful uses of derivatives (tax trading).

This 3 minute video explains what is an expert witness and why Navesink International is unique and uniquely qualified for options & futures, trading, derivatives, complex securities:

Click here to reserve your call/Zoom to find out more about our litigation support and expert witness service and how we can help you, to confidentially discuss your case or to find out more about Navesink International.  

Navesink International is retained by the most prominent attorneys and law firms for litigation support and expert witness services for both plaintiffs and defendants. We provide written expert reports, depositions and testimonies for lawsuits and arbitrations.

Our partners include Ankura, Barrington Financial Consulting Group, The Bates Group, Global Economics Group, Moskalev Consulting and SEDA Experts, allowing Navesink International to handle the largest and most technical cases over a long period of time.


Turkey’s fall

The Turkish Lira is free falling. It has been weakening for years (from parity to 12 TRY to the dollar), but the 15% fall on Tuesday is causing a lot of pain and concerns. It could be intentional.


The Rise of Money Launderers on Snapchat and Instagram

An interesting British documentary about how money mules are recruited by larger money launderers, and how easy it is to lure young people into crime for a few grands.

Evergrande default is highly likely, S&P says

This is not good. If you wanted a trigger for a recession, this could be it.
Standard & Poor’s says that Evergrande will default – it cannot sell new constructions.


Leveraged up, leveraged down

Leverage has benefits on the way up, but it has drawdowns on the way down.
Exchanges need to pay the winners, so they HAVE to go after the losers.
You will get sued, and your house and savings are theirs in most cases


Market up, vol up

We are currently in the unusual market situation called “market up, vol up”, where volatilities go up while the market rallies. It is driven by retail purchases into the tiny calls, notably for the small caps and the meme stocks.


Panel Ponzi Prison

A San Francisco couple, founders of a legitimate solar panel company, were sentenced to 15 and 30 years in prison for orchestrating a Ponzi related to equipment leases. They had 150 collectible cars and 32 houses.

US -Flattening

Rates rise, curves flatten, hedge funds lose

There have been some sudden movements in the global rates recently – rate rises, curves flattening, inflation threats.
The big and famous in the hedge fund world are raking significant losses.


The Good Samaritan who stole millions

The good Samaritan William Neil “Doc” Gallagher was actually a Ponzi artist defrauding the Texas Christian community.
He has been sentenced to three life sentences plus 30 years.


Nigeria banned cryptos, introduces CBDC

Nigeria had banned cryptocurrencies earlier this year (to little effect). It has now introduced its CBDC, the eNaira. Currency and government stability are the likely reasons. Other countries will follow.

The pros and cons of crypto markets (vs. regulated markets)

There are structural issues in both the crypto and regulated worlds. But how deep and how frequent are they? Here is a review of Cryptos’ pros and cons.

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