Jane Street’s story is legendary — a private prop-trading powerhouse built on math, data, and technology. It thrives by exploiting micro-inefficiencies and providing liquidity, using AI-driven algorithms far faster and smarter than human traders. As markets become more electronic, firms like Jane Street should keep an edge — but competition, regulation, and black-swan risk mean not every quant firm will survive.
Following their “holdings” isn’t practical — their positions are opaque, short-term, and hedged. At best, treat public filings as signals, not templates.
Financial advisors still matter: algorithms can’t manage behaviour, taxes, or life goals. Advisors now act more as strategists and behavioural coaches than stock-pickers.
As for SIT stock’s 46% YTD drop — it reflects weak fundamentals and shrinking margins. It’s a cautionary tale: algorithmic brilliance can’t save a firm with poor execution or fading demand.
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