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The money you lose to not looking
On a16z, finance was called the least practical use for AI agents. The SEC's $60 million cash sweep case points at a more useful job.
David Pawlan has tested more AI assistants than most people have heard of. On a16z's September 29 episode with Anish Acharya, he ran through the use cases people talk about most in the assistant group chats he's in (more than 1,200 people across them, by his count). Finance was the last category he named, and he didn't soften it: "it is in my opinion the least practical."
His reasoning is hard to argue with. "If you could have an agent make a billion dollars for you, all the hedge funds would be doing it." And yet: "you give someone an agent, a powerful tool right in their hands, and the first thing they think is okay, how are you going to make me a million dollars?"
I build Keepfolio, a finance app for people who run their own brokerage account, so you'd expect me to push back. I mostly agree with him. No agent can promise to beat the market, and Keepfolio doesn't try. Acharya's reply is where the useful idea sits.
Profit pools built on not looking
Acharya's response was that finance carries "a ton of administrative overhead for the average consumer," and then pointed at "the number of financial markets or financial profit pools that are defined by consumer apathy or being uninformed ... that's a lot of profit dollars that could be delivered back to the consumer."
That sentence describes a real, documented business. On January 17, 2025, the SEC settled charges with Wells Fargo Advisors and Merrill Lynch over the cash sweep programs they offered advisory clients. A sweep program is the default place uninvested cash goes in a brokerage account. The two Wells Fargo entities paid $28 million and $7 million, Merrill paid $25 million, $60 million in all. The SEC's orders found the firms or their affiliates set the sweep rates, and during the rate hikes "the yield differential between the BDSPs and other cash sweep alternatives at times grew to almost 4 percent."
Nobody needed an agent to see that gap. The SEC found the sweep was the only cash sweep option most of those clients had, so the fix was never a clever trade. It started with noticing where the cash sat and what it earned. Meanwhile the firms kept the difference.
It hasn't gone away. Ameriprise's bank sweep program lists 0.03% on balances under $5,000, effective September 28, 2026. That rate is public and legal, and you only see it if you go looking.
Where the free money comes from
Pawlan's best examples all have the same shape. Someone's assistant went through the past year of receipts and filed HSA reimbursements. His own assistant contacts the airline for a travel credit when a fare drops after he books. The episode's word for the hook was that it's "going to feel like free money," and that's right.
That money comes from attention applied to things people already own and don't check. A brokerage account is full of them. Margin creeps up on a balance you stopped watching. A position drifts well past the weight you meant it to have.
That's the job Keepfolio is built for. It reads your brokerage account through a read-only connection and resolves it into one operating picture: holdings and cost basis, margin utilization against the ceiling you set, income moving through the account, and the risk underneath. Each morning, Cassandra (the analyst inside the app) writes a briefing on what changed and why it matters, with the source behind every line. It doesn't pick stocks, and it can't move money. Its job is to put those numbers in front of you every morning so drift doesn't go unread.
The case against
Ben Thompson, as Acharya relayed him from a TBPN appearance, argues most consumers are "looking to spend time, not save time." Pawlan went further: "the general population does not care about being 10% more efficient." On that view, a daily report about your own account is homework, and people don't want homework. But reading the sweep rate was the homework that mattered in that SEC case.
That's fair for the general population, and Keepfolio isn't built for it. It's for someone who already runs their own account and already carries the overhead Acharya described. That person already does the digging by hand, across the brokerage site and whatever spreadsheet they keep. The briefing is the same read, done before they sit down.
What a finance agent can actually catch
Pawlan is right that no one's phone is going to make them a million dollars. The SEC case shows how much can leave accounts quietly, through defaults nobody revisited. A tool that puts your account's numbers in front of you every morning makes a much smaller promise than a million dollars, and it can keep it.
SOURCES
Keepfolio reads a brokerage account through a read-only connection and never places orders. One operating picture