Been going down a rabbit hole on Jane Street and honestly, the pattern emerging across different markets is genuinely unsettling. This isn't just one incident—it's a recurring playbook that keeps showing up everywhere.

Start with India. Between January 2023 and March 2025, Jane Street pulled roughly ₹365 billion in profits there through a pretty sophisticated setup. SEBI flagged ₹48.4 billion as suspected illegal proceeds and temporarily banned them. Here's what caught my attention: they structured it through multiple entities (Singapore FPI, Hong Kong FPI, Indian subsidiaries) so the visible trading and actual profit-generating operations were completely separated.

The mechanics are wild. Morning session—they'd aggressively buy Bank Nifty stocks and futures, pushing the index up. Meanwhile, their offshore entities had massive short option positions set up (short calls, long puts). Then afternoon comes and they reverse everything, dumping the same stocks. Index crashes. Their worthless call options stay worthless, but those put options? Suddenly worth billions. The spot market takes a small loss while the derivatives book explodes. One day they made ₹67.3 billion profit this way.

Now look at Bitcoin. For months there's been this mechanical selling pressure hitting right around 10 a.m. Eastern Time. That window matters because US markets are open, liquidity is high, and large orders execute cleanly. Price drops 2-3%, liquidates a ton of leverage, triggers forced selling cascades. Then it stabilizes and rebounds. The structural similarity to what happened in India is obvious—underlying asset gets pushed around to manipulate derivative outcomes.

What's really interesting? This 10 a.m. pattern basically stopped after the Terraform lawsuit filed on February 23, 2026. Bitcoin started rebounding instead. When a recurring mechanical pattern vanishes the moment legal pressure appears, people notice.

Then there's the Millennium lawsuit. Two senior Jane Street traders left for Millennium in early 2024. Jane Street sued for stealing their Indian options strategy. During proceedings, a detail emerged: that strategy alone generated approximately $1 billion in profits in 2023. Court documents were heavily redacted—the algorithm, timing models, strike price framework, delta exposure management, all sealed. We only see the profit number. The engine stays hidden.

This exposure actually triggered the SEBI investigation. The regulatory action was basically an inevitable consequence of that $1 billion strategy becoming public knowledge.

What gets me is the pattern. Jane Street appears across stocks, crypto, ETFs, private equity rounds. SEBI ban for index manipulation. Millennium lawsuit over a billion-dollar options strategy. Terra allegations about coordinated UST collapse. Now they're authorized participant for major Bitcoin ETFs but the 13F filings only show long ETF positions—nothing about short futures, swaps, sold options, or net hedged exposure. The visible layer and the actual derivatives positioning are completely disconnected.

I'm not saying there's definitely collusion. But when you're one of the world's largest quant firms with operations across every major asset class and you keep showing up at the center of major crashes and upheavals, the question becomes: is this just coincidence from scale, or is there something structural about how they operate that lets them profit massively from market disruption?

The unsettling part isn't any single incident. It's that their most profitable systems are classified as confidential, similar structural patterns keep repeating across different markets, and they've built the architecture to operate across multiple entities in ways that make the full picture invisible to regulators and the public.

Worth paying attention to how this unfolds.