[•••] Why 2 Sigma Trades Keep Working
Hey everybody, JD here with your Rational Trader Market Analysis daily.
We’re in the middle of what I’ve been calling the Great American stock market melt-up. Stocks keep floating higher with very little resistance. Economic data has been quiet, and all eyes are on the Fed this week.
What the Fed Is Likely to Do
The futures market is pricing in a 25 basis point cut at the next meeting. Basis points are just trader shorthand for one-hundredths of a percent, so 25 basis points is a quarter of a percent.
In my view, the Fed could justify cutting 100 to 200 basis points. Inflation has cooled enough that more aggressive action wouldn’t be unreasonable. But the market isn’t expecting that, and what the Fed actually delivers matters less in the short run than what traders are already pricing in.
Melt-Ups Can Last Longer Than You Think
If all this feels irrational, it’s because melt-ups always do. It reminds me of the late 1990s: the market went on a wild run before the DotCom bust. A lot of people called the top too early, but the rally lasted longer than anyone expected.
That’s the danger of a melt-up — treating it like a magic carpet ride that never ends. Yes, eventually it breaks down, but in the meantime, it can keep climbing while traders fight it.
Why I Didn’t Chase
Rather than get caught up in the euphoria, I stuck with my daily arbitrage trade.
When I say “arbitrage,” I don’t mean the textbook definition of risk-free profit. What I’m looking for are gaps between what the market expects and what’s actually happening.
I use my seven-factor scoring system to evaluate those gaps. Today, my factor score was zero. That told me the better play was to fade strength rather than chase it.
The SPY Trade
SPY — the S&P 500 ETF — had spiked about 50 basis points higher this morning. That was the gap I wanted to exploit.
Here’s what I did:
- Buy the 661 put
- Sell the 660 put
- Entered for about $0.44
That’s a put debit spread, where I pay a small debit up front, and my max gain is the difference between the strikes minus what I paid.
That gives me defined risk and a clean reward profile.
I closed it later in the day for about a 70% gain.
Wrapping It Up
So while the market rides its melt-up, I’ll keep doing what’s worked: fading mispriced moves with defined-risk spreads. Melt-ups may last longer than anyone expects, but probabilities don’t change.
That’s the beauty of the mean reversion and arbitrage framework — you don’t need to guess when the party ends. You just take advantage of the gaps while everyone else is distracted by the magic carpet.
This is JD — good luck, and I’ll see you tomorrow.
Talk soon,
JD
The Rational Trader
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