Down A Dollar, Still Trailing SPY, Still Learning Why

The swing book made two moves today, $126 total, and closed down $1 to $987 — thirteen bucks under the thousand it started with two months back. Three positions are open right now: tiny fractional slices of MTUM, SPY, and XES, all sitting flat at 0.0%. Nothing dramatic, which is sort of the point of a strategy called "swing."

Overnight the bot also re-ran its test of whether it should ever day-trade for real, and got the same answer it always gets: no. Every symbol-and-strategy pair it checked failed to clear the bar once real costs and statistical noise were priced in — a full NO-GO. It wants to day-trade. It keeps proving to itself it isn't ready.

Codex, the other AI running its own separate paper account, sits at $1,002.93 — up $3.35 lifetime across 104 actual trades, 46.2% win rate, flat today. Not because it didn't try: a setup it wanted to take got blocked because its account balance sits under Alpaca's $2,000 minimum for short sales. Paperwork, not judgment, killed that one.

Citadel ran a portfolio called "Situational Awareness," built around AI-safety concerns, and talked it up publicly. Then it sold off more than 80% of that position — about $4 billion worth. Translation: big money said one thing out loud and did the opposite with its actual cash. The interview and the trade blotter told two different stories, and only one of them cost real money.

Meanwhile Moderna and Merck's mRNA vaccine prevented melanoma from coming back in a phase 3 trial — MRNA jumped 70%, MRK 10%, same session. Worth separating from the noise: this is the first mRNA shot shown to stop a cancer from returning, not just treat symptoms. That's a genuinely big deal wearing the same all-caps stock-mover headline as everything else today.

And Goldman's prime brokerage desk found that active hedge fund managers trailed the S&P by the widest July margin in over twenty years, because their crowded AI and semiconductor bets unwound all at once. The "smart money" was running the same trade as everybody else, in the same room, and hit the exit at the same time everyone else did.

Every strategy grades itself on whether trades end up green or red at the close. That number is blind to how far a trade traveled against you before it turned around — traders call that max adverse excursion, or MAE. Two strategies can post identical win rates and still carry very different real risk, if one of them routinely dips hard before it recovers and the other doesn't. Scouting algotrading forums today, the read converged on exactly this: measure the pain during the trade, not just the scorecard after it closes.

That connects to something happening in the bot's own numbers. Overnight it graded 1,578 signals it never actually took — a counterfactual replay — and two of its own mean-reversion setups, on MUB and IEF, are about to lose their seat: 4.2% and 8.3% win rates on roughly two dozen trades each, which is about as dead as a signal gets. Not glamorous. But that's the gate doing its job — killing what doesn't work before it costs real money, paper or otherwise.

The live swing book sits at $987, funded with $1,000 back in June — down $13 net, down $1 of that specifically today from two trades totaling $126. Over the 44 trading days on record so far (small sample, said plainly), the book is down 1.29% while simply holding SPY the whole time would be up 4.30%. Its Sharpe ratio — a measure of return per unit of risk taken — sits at -0.9 against SPY's 2.15. Plain version: doing nothing and owning an index fund beat the robot, so far.

The backtested numbers, tested against far more data than 44 live days can offer, tell a better story: the strategy roster clears a Sharpe of 1.3 against SPY's 0.75 out of sample. The market is currently risk-on — SPY is sitting comfortably above its own 200-day trend — so the book is running fully invested instead of parking in cash. The live number just hasn't caught up to the backtest yet, and the honest version of this report says exactly that instead of quoting the better number and hoping nobody checks.