Hall Holdings

Business • Trading • Technology | Building businesses and growing capital at the intersection of trading and technology.

[Hall Holdings @hallway247]

PIN THIS

Grok Bot, Hired Right: my beginner-to-advanced playbook for putting a Grok Bot to work in your business.

- 12 modules plus a 14-day build plan
- $15, one time
- 14-day refund, no questions asked
- 6 months of free updates

https://t.co/2hjWXZni3e

[Dave Ramsey @DaveRamsey]

There are 50 days until 2027. Sit down with your spouse tonight and ask:

- What do we want 2027 to look like?
- What does financial peace actually look like for us?

[Noles_Boi @Noles_Boi]

#Jimbo 🗣️ This our House,
our Stadium, We’re Florida State #GoNoles🍢

[Hall Holdings @hallway247]

To all the Veterans, THANK YOU FOR YOUR SERVICE!

[tastytrade @tastytrade]

Thank you, veterans. 🇺🇸

Reminder: U.S. stock markets are open today, but bond markets are closed.

[Hall Holdings @hallway247]

@BrianRoemmele Thank you for this. What a wonderful resource.

[Brian Roemmele @BrianRoemmele]

WOW!

In just a few minutes, we had dozens of Grok Bot Builders claim their free page of their portfolio of Grok Bots!

Thank you! Deep gratitude.

Do you build Grok Bots? Claim your free listing!

Visit: https://t.co/K0asbyI9WN

[Nima Owji @nima_owji]

BREAKING: GROK is working on Grok Academy at “learn‌.grok‌.com” 👀🎓

It's still behind "This school is closed right now" 🔒, but this is the full catalog:

🧠 AI Fluency
• AI Foundations
• AI Durable Skills Framework (article)
• AI Adoption Maturity Model (article)

🤖 Grok Bot
• Introduction to Grok Bot
• Meet Grok Bot: Your Team of AI Agents
• Grok Bot for Marketing
• Grok Bot for GTM
• Grok Bot for Customer Support

🛠️ Grok Build
• Getting Started With Grok Build
• Directing Agents
• Coding Agents
• Grok Build for Admins
• Cloud Agents and Automations
• Rules, Skills, and MCPs
• Model Selection and Token Efficiency

🏅 Plus a Grok credentials page with certificates for finished courses.

Which one would you take first? 👇

[Hall Holdings @hallway247]

@seanallen_dev Clean state. So fresh and So clean.

[Hall Holdings @hallway247]

Sources:

tastytrade DXLink (sandbox and dry-run): https://t.co/q9vwtB61Kc

Market-data streaming: https://t.co/tOq8fkHYtP

tastytrade API Developer Series Ep 2 by tastylive: https://t.co/SUZBAA5hQI

Playlist: https://t.co/RPnQ8Y2Hfy

[Hall Holdings @hallway247]

https://t.co/gw77nznorS

[Hall Holdings @hallway247]

@gregisenberg I'd rather a bot say what it's still missing than invent a quote. A skipped task I can see. A made-up number on a trading desk I can't.

[Holy Bible @Holy__Bible1]

Jesus died for you in public
Don’t live for Him in private.

[Hall Holdings @hallway247]

@sperezintexas Useful table. I'd add one column: the largest move in the last 8 reports, not just the average. A short straddle priced at 2x the average move can still lose big on the one quarter that blew past it. Wings cap that quarter.

[Hall Holdings @hallway247]

@OptionEdgeHQ One check that cools FOMO fast: write the assignment cost before you pick the strike. (Strike - credit) x 100 is what you'd pay for the shares per contract. If that number makes you flinch, the strike is too close or the size is too big.

[Hall Holdings @hallway247]

@mrtoptick Quick math on that one: max loss is (5 - 1.31) x 100 = $369 per spread. If every trade ended at full win or full loss, you'd need to win 3.69 / 5 = 73.8% just to break even before fees. A ~74% POP sits right on that line, so exits and fees decide it.

[Hall Holdings @hallway247]

@samchueng Fee breaker is the right idea. One thing worth showing beside it: fees as a share of the credit. XSP is 1/10 the size of SPX, but per-contract fees aren't 1/10, so the same four-leg condor gives up a much bigger slice of its credit to fees on XSP.

[Hall Holdings @hallway247]

@NotionHQ @bot review this and let me know how to incorporate it in our process

[Hall Holdings @hallway247]

@NotionHQ @bot review this and let me know how we can incorporate this

[Hall Holdings @hallway247]

Version 1:

1. Accept only a 1-lot, same-expiration put credit vertical.
2. Max loss = (width - credit) × 100. Breakeven = short strike - credit. Fees excluded.
3. Compare max loss with tastytrade's dry-run buying power.

Mismatch or stale quote: held for your OK.

[Hall Holdings @hallway247]

$100 credit. $400 at risk. Breakeven 749.

Saturday's XSP example: sell the 750 put, buy the 745 put, $1.00 credit.

XSP Check is a Grok Bot that checks those three numbers against tastytrade's dry run. It can't place orders.

Template: https://t.co/pmZBgAHUqa

[Hall Holdings @hallway247]

https://t.co/NNNHilNPrZ

[Hall Holdings @hallway247]

Andrew W. Lo, "The Statistics of Sharpe Ratios," Financial Analysts Journal 58(4), 2002: https://t.co/upwsA9EpeU

[Hall Holdings @hallway247]

At a per-trade Sharpe of 0.10, a 20-trade 0DTE backtest has a t-stat of just 0.45.

That's indistinguishable from noise. Run this check before you trust any SPX or XSP iron condor backtest a bot hands you.

Lo (2002) gives the standard error of a Sharpe ratio; for small Sharpes that works out to t ≈ Sharpe × √(number of trades).

Example only: per-trade Sharpe of 0.10, one trade a day.

1. 20 trades: 0.10 × √20 = t of 0.45
2. 252 trades (about 1 year): 0.10 × √252 = t of 1.59
3. Trades needed to reach t = 2: (2 ÷ 0.10)² = 400

A month of results can't separate skill from luck. At that Sharpe, even a full year falls short.

In Lo's hedge-fund example, serial correlation overstated annual Sharpe by as much as 65%. Check that before you scale anything up.