Follow 7 big funds and 8 market themes in Portfolios

Portfolios has 15 new ones, 29 in all. Seven follow a big fund through its 13F filing, from Berkshire Hathaway to Bridgewater. Eight follow a theme, such as AI Chips, Defense or Space. The page is simpler too: two short lists and How it works in three steps.

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• The funds: Berkshire Hathaway, Renaissance Technologies, Pershing Square, Bridgewater, Druckenmiller, Appaloosa and Tiger Global. Each holds up to the 15 largest positions in the fund's newest 13F filing.
• A 13F is filed up to 45 days after the quarter ends and shows only US long positions. A fund portfolio changes only when a new filing comes in.
• The themes: AI Chips, Photonics and Optical Networks, Defense, Nuclear and Uranium, Robotics and Automation, Quantum Computing, Space and Crypto Stocks. Each holds up to the 10 largest companies on a published list, in equal shares, and is reviewed every quarter.
• The page now opens on two lists, Top performers and Newest, with a chip for each group. How it works has the three steps: pick a portfolio, connect your account, and trades happen in your own account.
• Copying is part of Pro and starts with practice money. Real money runs in your own Alpaca account. The new portfolios are tracked from their first daily close, with nothing filled in before.