Melvin Capital's big bust - Robinhood's legal team - Steve Cohen's Twitter nightmare

NYSE trading floor sad — AP Photo/Seth Wenig

Good morning and welcome to Insider Finance. I'm Dan DeFrancesco, and here's what's on the agenda today:

One of the hedge funds at the center of the GameStop trading frenzy is down big.
Insiders detail the rise of Stephanie Cohen, the star Goldman executive leading its plans for Main Street.
As Robinhood prepares for what could be a series of legal battles, meet the key players representing the fintech.

Sign up here for a webinar on the red-hot IPO market on February 3 at 2:30 pm ET with chief finance correspondent Dakin Campbell. Speakers include Goldman Sachs' Kim Posnett, Latham & Watkins LLP attorney Greg Rodgers, and Lead Edge Capital's Mitchell Green.

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GameStop short-seller Melvin Capital lost 53% this month after the Reddit-fueled frenzy sent shares soaring

Melvin Capital founder Gabe Plotkin
Alex Flynn/Getty Images/Bloomberg

Melvin Capital, one of the hedge funds at the center of the GameStop trading frenzy, is down 53% in January. Read more here.

Hedge fund billionaire and New York Mets owner Steve Cohen left Twitter after GameStop backlash

Steve Cohen, Steven Tananbaum — Steve Cohen talks at a charity gala in 2019
Dave Kotinsky/Getty Images for Lincoln Center

Steve Cohen, founder of Point72 Capital and the owner of the New York Mets, deactivated his Twitter account after he said his family received threats tied to the Reddit trading frenzy. Check out the story here.

Inside the rise of Stephanie Cohen, the Goldman Sachs dealmaker leading a make-or-break push to take on Main Street

Goldman Sachs has grand ambitions to become the friendly bank next door. Meet Stephanie Cohen, the executive whose shoulders those aspirations largely lie upon. Read more here.

Robinhood has been beefing up its legal firepower with these 11 lawyers including SEC veterans and a Goldman Sachs in-house counsel

Robinhood Legal — Debevoise & Plimpton; Reuters

Robinhood has once again found itself in the middle of some legal issues, so meet the team heading up those challenges. See more here.

A top SEC official was receiving a $1.6 million law-firm pension from Simpson Thacher that was 7 times his government salary. It shows why cracking down on 'golden parachutes' is so hard.

William Hinman, a Simpson Thacher partner who led the SEC's Division of Corporation Finance
Securities and Exchange Commission

Bill Hilman was getting a nice pension from his former employer. Get the full rundown here.

Here's why lawyers and former regulators say the SEC's hands are tied despite calls to clamp down on the GameStop trading fiasco

Get the latest update on what course of action the SEC can, or can't, take in its investigation into brokerages restricting trading of GameStop and other stocks. Find out more here.