The All-Weather Investor | Building a $5M portfolio—$1M already achieved | Sharing everything I learn along the way

Strategic stock investing for Wealth Managers and Family Offices.

Wealth preservation is essential. 

But true financial stewardship requires strategic growth—built on conviction, discipline, and risk management.

Many wealth managers and family offices struggle to find stock investment strategies that deliver superior returns without unnecessary complexity. Our approach bridges that gap.

I’m Marcello, a former doctor turned full-time investor with two decades of experience in stock and crypto markets. 

Since 2016, I have worked with wealth managers, family offices, and high-net-worth individuals to implement investment strategies that maximize performance while protecting capital.

In 2020 and 2021, my momentum-based approach transformed $32,000 into over $1 million. 

Today, we refine and apply that strategy for professionals seeking an edge in the markets.

What we offer: 

↳ Institutional-grade stock strategies designed for long-term performance
↳ Risk-managed investment frameworks to navigate uncertainty with confidence
↳ Tailored solutions for wealth managers and family offices seeking scalable, high-conviction strategies

If you're looking to strengthen your portfolio strategy with a proven, data-driven approach, email me at marcello@mdvinternational.com

Marcello Duarte Vieira

Great managers are great at execution. It’s not only about picking good stocks, but also about position sizing, letting winners run, and cutting losses short. I would argue that execution is even more important than stock picking.

Fund Manager | Specialized Momentum & Risk-Hedged Solutions for Family Offices & Advisors | 20+ Years of Market Experience

In most market environments, strong stocks perform extremely well. The exception is bear markets and liquidity crises, where hedging matters most. Otherwise, concentrate on stocks in strong phases. Right now, memory, fiber optics, gold miners, and commodities stand out.

AI is speeding up the markets, making trends shorter and more volatile with sharper swings. More than ever, you need to move quickly and not always hold out for a pullback before jumping into a new trade.

You need conviction in your strategy so you can handle volatility without doing dumb things. Conviction comes from knowledge + experience.

Strategies should be built on first principles. There is no single magic formula in fundamental or technical analysis. You need to understand the concepts that truly make sense and matter most (the 80/20 rule), and have the courage and discipline to execute.

Most investors spend too much time asking: “Am I right or wrong?”
The better question is:
 “How much do I make if I’m right, and how much do I lose if I’m wrong?”
That is the real game.
In investing, win rate is overrated.
 Payoff ratio is what changes everything.
You can be right 70% of the time and still lose.
 You can be right 30% of the time and still outperform.
That is why investing is so hard: it goes against human nature.
 And that is also why conviction and sizing matter far more than most people think.

Grow Your Career 1% Daily - I’ll Show You How | Follow for Tips on Learning, Professional Development, and Productivity | Professor | MBA + JD

Is this the part where I talk about brand voice, distribution, and storytelling across the funnel? Or say we “help companies scale content that converts”?

𝗪𝗲 𝗱𝗼 𝗮𝗹𝗹 𝘁𝗵𝗮𝘁.

But what we really do is write content your team doesn’t have to worry about, so you can stay focused on strategy, not sentence structure.

𝗛𝗲𝘆, 𝗜’𝗺 𝗦𝘁𝗲𝗽𝗵𝗲𝗻. 👋

And my path here hasn’t exactly followed a playbook:
Banking → Law School → Teaching → L&D → Content

(Yeah… it’s been a ride.)

Today, I run a B2B content agency with my wife. We keep it lean and personal — just the two of us, plus our kids and a couple barky mini schnauzers. 

At Damn Smart Marketing, we give marketers writing they can trust and results they can stand behind.

✓ Content that sounds like you (not a template, not bland AI)
✓ Full support from idea to publication
✓ A partner who gets content
✓ Zero fluff, zero hand-holding
✓ More time to focus on what matters

In other words: you get to 🚀 while we handle the ✍️.

𝗟𝗼𝗼𝗸𝗶𝗻𝗴 𝗳𝗼𝗿 𝗮 𝘄𝗿𝗶𝘁𝗶𝗻𝗴 𝗽𝗮𝗿𝘁𝗻𝗲𝗿? 𝗧𝘄𝗼 𝘄𝗮𝘆𝘀 𝘄𝗲 𝘄𝗼𝗿𝗸:

1️⃣ 𝗗𝗼𝗻𝗲-𝗳𝗼𝗿-𝘆𝗼𝘂 𝘄𝗿𝗶𝘁𝗶𝗻𝗴 𝗳𝗼𝗿 𝗰𝗼𝗻𝘁𝗲𝗻𝘁 𝘁𝗲𝗮𝗺𝘀.
Blogs, LinkedIn posts, newsletters, case studies. If it’s got words, we’ll write it. You get to run the show without sweating every sentence.

2️⃣ 𝗟𝗶𝗻𝗸𝗲𝗱𝗜𝗻 𝘀𝘂𝗽𝗽𝗼𝗿𝘁 𝗳𝗼𝗿 𝗳𝗼𝘂𝗻𝗱𝗲𝗿𝘀.
We’ve built an AI-assisted workflow that makes posting easy, effective, and actually worth reading.

If you're curious, DM me. 

No cold, hard pitch, I promise. Just a real convo about where you’re headed and whether some damn smart content can help.

Stephen 😀

Stephen Mostrom

Can I run a theory by you? (about writing, Gen AI, and B2B)

Donna and I call it “the commodification of passable writing.” 



Here’s the gist: 

Before ChatGPT went supernova in ’22, if you needed written content for your business (linkedin, website copy, emails, the works), you had three options. 

Write it yourself 
Hire someone to write it 
Staff in-house folks

Sometimes this led to bottom-of-the-barrel stuff that hurt the brand. But most companies putting out content did the minimum to look good.

Then came the Gen AI revolution
(dun dun dun)

And with it the commodification of passable writing. 

With a free account and a five-word prompt, anyone could generate something that looked fine.

No typos
Some kind of point
Basic structure

AI collapsed the floor of B2B writing, pulling everything toward the middle. 

Everything except the top band. 
Because AI didn’t touch the ceiling. 

Original ideas and data
Writing with your fingerprints all over it
Deep empathy for your audience
Storytelling grounded in experience

That’s always been the gold standard. 
And nothing about that has changed. 

Commodification explains so much about what we’re seeing today. Every channel flooded with lifeless, technically correct words. 

It also explains why companies like Anthropic, OpenAI and Netflix are scooping up world-class storytellers and paying them up to $1M a yr. To meet hyper-aggressive growth goals, they can't afford to sound like everyone else.

We’re living in an era dominated by passable writing. 
100x more middle. 

Here’s the irony…
The middle is where B2B content goes to die. 

Always has been.

B2B Content & Executive Ghostwriting for Tech and Finance | Human words, AI workflows | JD & MBA | Running a two-person agency with my wife (still married)

If even 10% of LinkedIn was written by a human…




I might want to scroll my feed.

Anyway. Back to the 5 people who still deal in original thoughts.

They’ve earned my attention.

"Can I be real a second? For just a millisecond? Let down my guard and tell the people how I feel a second?" 🎶

Yes, you can. And you should. 

Why?

Because stories are the new credibility on LinkedIn. 
Because struggles are the new authenticity on LinkedIn. 
Because lessons learned are the new value on LinkedIn. 

AI has turned everyone with a laptop into a “thought leader.” Except… all the thoughts sound the same. 

What’s not the same?

You. Your experiences. Your unique perspective. 

That’s AI-proof content. And when you craft it right, it’s the fastest path to standing out in a feed drowning in "you should be doing XYZ" posts.

Example: 

One of our ghostwriting clients went viral the other day. 

6,380 likes. 369 comments. 161 reposts.

The post? 
Her journey getting rejected from her dream job… 
And the tweaks she made that finally opened the door.

It was simple. It was one-of-a-kind.
And it resonated. 

Because she was real a second.

In the middle of every prospect call, Donna stops and says the same thing. "Full disclosure: We DON’T stay in our lane."

Yes, we’re writers. Hired to write. 

But after 9 years and millions of words, we've learned to spot what others miss.

A content process that could run smoother. 
An angle that could hit harder.

We surface them every time. 

We can do this because we don't operate like a typical agency. For starters, it's just Donna and me. We put eyes on everything.

We've worked across dozens of clients, hundreds of campaigns. We've seen the good, the bad, and the ugly.

Most importantly, we trust our instincts. And we build relationships where our clients do too.

Getting outside our lane has helped us: 

Turn a finance founder's LinkedIn from in-the-weeds tactics to leadership storytelling. 20k followers in 9 months.

Pitch a Succession tie-in to a bank's blog team. It became one of their top-performing series.

Convince a SaaS CEO client to blow up their newsletter format. One story, one message, no grab bag. Thousands of subscribers followed.

Most agencies live in their lane. 
It's safer that way. For them.

We’re not like that.

One of our clients (SaaS CEO, Finance) landed multiple 700k+ impression posts last year. I looked back, and these 4 elements showed up every time:

1. A personal story

Every winning post centered on something emotional and specific:
– Bombing a board meeting
– Absorbing painful feedback early in her career
– Breaking a proven rule to get results

The human story was the wedge. 
We used it to deliver her POV.

2. A dynamite hook

Busy execs don’t read 250-word posts unless the first line earns it.

Her high-performers nailed the hook:
– Picturesque setup
– Hyper-specific tension
– Sparks of curiosity that earn a click

One time, she opened with a tell-all on a thorny relationship she'd had with her past CEO (and what she did about it). 

Readers leaned in.
6,380 likes. 369 comments. 161 reposts. 

3. Real talk, no fluff

She dug into the moments most CEOs keep to themselves.

“This almost broke me”
“Here’s what I got wrong”
“Nobody talks about this part…”

That vulnerability built trust fast.
And it lasted as more and more finance leaders started following.

4. Plain language

I dropped her posts into Hemingway Editor.
Most landed at a 3rd grade reading level.

Complex ideas, easy to absorb. 

Too many leaders try to sound smart on LinkedIn.
But clear is what’s landing.



In 9 months, this CEO went from a lukewarm LinkedIn account to 20k active followers and 10M+ impressions. 

The beauty: it's a playbook any exec can follow. 
If they're willing to drop their corporate armor.

Overrated: sounding smart on LinkedIn.
Underrated: sounding human on LinkedIn.

People have to know and like you before they'll trust you.

Human psychology 101. 
(yes, it applies to B2B)

“I apologize for such a long letter…” 





Mark Twain once said. “I didn't have time to write a short one."

A reminder for anyone who creates.

Great writing isn’t more, more, more.
It’s meaning.

And meaning takes time.

Generic AI writing is a commodity. And it’s the fastest way to go invisible. 

I joined Dorien Morin-van Dam on Strategy Talks to break down what to do when everyone has access to the same baseline of LLM-powered words. 

More, more, more or faster, faster, faster won't help you stand out.
But outwriting AI will. 

And you do that with a unique POV, writing that has your fingerprints all over it, and assets only your business can produce. 

Dorien and I talked about:

- The trap of churning out 160 articles in 90 days (aka the “spray and pray” approach)

- How one of our CEO clients generated 10M+ impressions, 20K+ followers, and pipeline with a simple, human approach to LinkedIn

- Where we recommend deploying AI in the content process, and where human creativity is the only edge left

Check out the full convo here.
https://lnkd.in/gy-V4z_5

Claude called me out on my sh*t yesterday, and I needed it. 

Lately, I've been ending every month by throwing my LinkedIn posts into a painstakingly-built Damn Smart Marketing strategist and asking questions.

Did my posts speak to buyers (or other content people)? 
Did my proof points earn the claims I was making?

Yesterday, I ran my February analysis and… uh oh. 

Exact words: "You're making the argument. You're not proving it. Your best content is sitting in your client work and you're leaving it on the table."

Truth is, my instinct has always been to let the work speak for itself. 

Talk less. Deliver more. Trust that the results will find their way into the right conversations.

In February, this instinct to avoid the “brag” took over without me realizing it. And it hurt my content. 

Because Donna and I have been in the trenches for years. 

We have metrics that prove our strategies work. 
Testimonials that prove our approach delivers.

And I wasn’t talking about it enough. 

So when I made an argument on LinkedIn, it didn’t have the lived-in umph that comes when you’re backed by years of experience. 

My posts risked sounding more like a talking head or an AI-first think piece. Not someone who’s been there, done that. 

No thanks. 

My gameplan moving into March: 

1 - Keep running monthly analysis. With an LLM that’s willing to push back, like Claude, you can spot LinkedIn gaps in seconds. 

2 - Lead with proof. In B2B, it’s the difference between sounding theoretical and sounding earned. 

3 - Learn, adapt, keep going. February's analysis stung. March's content will be better for it.

Now I’m off to dig up data for my next post. ✌️

AI broke content, right? Everyone sounds the same, right?

I'm joining Dorien today to talk about the path less traveled. How the smartest marketers x founders I know are using their empathy instincts and human voice to write things their audience actually wants to read. 

(Oh, and how they're using AI as an amplifier, not a replacement)

See you there!

Writer for B2B Tech & Finance ✍️ | Running a content agency with my wife (and yes, still married) | Human words, AI workflows | JD & MBA

Look who's talking with me this week? 
Stephen Mostrom, the damn smart marketer!

If you are struggling to stand out when using AI, this one's for you, and you and you and you.  

Live at 7 PM ET on 2/24, and of course, the replay will be available too if you can't make it live.

How to Outwrite AI: Ways to Keep Your Human Voice and Stand Out

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The Battle

Marcello Duarte Vieira

Stephen Mostrom

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The Battle

Marcello Duarte Vieira

Stephen Mostrom

Followers

Posts

Engagements

Likes

Performance Score.css-goub6s{font-size:var(--chakra-fontSizes-md);font-weight:500;color:var(--chakra-colors-gray-600);display:block;margin-top:var(--chakra-space-1);}Marcello Duarte Vieira's LinkedIn Performance

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Ready to grow your LinkedIn presence?

Performance ScoreMarcello Duarte Vieira's LinkedIn Performance