How SpaceX Shaped My Next Big Investing Breakthrough
Everyone wants to know what's going to happen next in the stock market.
If you've seen the stock-trading floor on Wall Street, its TV screens are full of technical charts that traders use to figure out if a stock is about to break out to the top or collapse.
Analysts spend their days sifting through thousands of pieces of data, using complicated mathematical formulas to find the next big investment or stock market move.
The technology and data Wall Street insiders use can cost hundreds of thousands of dollars per year.
It's something I know well... I spent a decade in my first career on Wall Street.
I worked as an elite derivatives trader at the investment bank Goldman Sachs and with other major institutions, including Chase Manhattan and Yamaichi (then known as the "Goldman Sachs of Japan"). I was able to learn from some of the best and smartest investors in the world, including Fischer Black... one half of the famous "Black-Scholes" formula for pricing options.
Some folks might think that this access to knowledge and technology gives me an upper hand in investing. This is a common excuse people give for not investing: They don't think there's any way to do as well as the "experts" on Wall Street.
But I don't want my readers spending their days in front of a screen sifting through data. As I've always said, you don't need investing to be your full-time job.
That's why, nearly two decades ago, I decided to start sharing everything I learned with people around the world. Here at Health & Wealth Bulletin and in my newsletters, we break down what's going on in the markets to help you make good decisions as you grow and protect your wealth.
I haven't stopped learning, either. The basics of long-term investing have remained constant throughout my 30-plus-year career... But an unlikely trading breakthrough is helping me pin down the best entry points and refine my short-term trading skills.
It's a new system that predicts the path of stocks like Nvidia, AMD and Zillow... This technology uses the same mathematical formula that lets SpaceX predict the path of 10,600 Starlink satellites – with near-perfect results.
It lets you type in the name of any stock or sector ETF and get an instant prediction for where it's likely headed over the next seven days... the next month... even the next year.
I'll launch this breakthrough tech to the public on July 15.
But you can claim early access to a trial version of the software now... for free.
Simply click here to add your name to the guest list for Wednesday's big reveal. By signing up, you'll get instant access to the trial of my new prediction tool. And you'll hear from me live on Wednesday morning as I explain this technology and walk you through how I use it in my trading recommendations.
I hope to see you next week. Reserve your spot right here.
Now, let's get to this week's Q&A... And as always, keep sending your comments, questions, and topic suggestions to feedback@healthandwealthbulletin.com. My team and I read every e-mail.
Super Movers Have Better Brains
Q: Dear Doc... Just heard a radio report about speed walking and how it helps brain health better than slow walking. I was wondering if you could share your take and how I know what pace I'm going/should go. Thanks for the help! – O.K.
A: Thanks for your question, O.K. We're guessing the study you heard about was published last month in the journal Neurology. Researchers looked at data for folks age 80 or older to compare those who walked at slow paces with those classified as "super movers" – those whose gait speed was 1.5 standard deviations above the average for their age group.
About 9% of the 3,989 seniors studied were super movers. And researchers found that this elite 9% reduced their risk of cognitive decline by about 50%.
That's an incredible result.
The study's authors pointed out that the decline in risk isn't only because the super movers had a habit of walking fast. Other factors included diet, overall activity levels, and genetics. But we've known for years that exercise helps keep your brain healthy as you age. This study just shows that the effort you put into your exercise is an important component.
While it's not easy to overcome your genetics, focusing on the other two – your diet and level of activity – can take you far when it comes to your healthspan.
You asked about the best pace, O.K. Research has shown the greatest benefits from a moderate level of exertion, particularly for seniors. One major reason is that it's easier on your body than intense exercise, so you aren't as prone to developing injuries.
Here are two easy signs you've hit this moderate level...
1. Breathing. To exercise at a moderate level, you should be breathing heavier than usual, but not straining. If your breathing is deep and hard, you're exercising at an intense level. And if it doesn't change from when you're at rest, you're going too slow.
2. Talking. At moderate levels, you can carry on a conversation, but you can't sing. At intense levels, you can only get a few words out here and there. And if you can still sing, that means you're not at moderate intensity yet.
Now, if you're not already walking, don't jump straight into a fast pace. You can ease your way in with interval walking.
Interval walking training ("IWT") is a bit like high-intensity interval training ("HIIT"). But instead of quick, intense bursts of exercise, you slightly vary the speed of your walk.
The standard for IWT is three minutes of slow walking (about 40% of your maximum effort) and three minutes of fast walking (about 70% of your maximum effort). You repeat that cycle five times, at least four times per week.
You can tailor this to your needs. If three minutes is too difficult, try two or even one minute and build your way up from there.
What We're Reading...
- Did you miss it? Introducing my very first stock system.
- Something different: A company plans to drop 600,000 bacteria-infected mosquitoes into D.C. this summer.
Here's to our health, wealth, and a great retirement,
Dr. David Eifrig and the Health & Wealth Bulletin Research Team
July 10, 2026