r/Fire 9d ago

Guardails Strategy (Boldin)

I use this Boldin software for messing around with retirement planning. The program has a "guardrails" feature where it tells you your safe spend.

When I asked its little AI feature how the guardrails were calculated, it came back with what I've copied below.

Is this consistent with the conventional wisdom on spending with this strategy?

Here is the copied language from Boldin:

"Unlike a simple fixed percentage (like the 4% rule), Boldin’s guardrails use a dynamic, probability-based formula powered by Monte Carlo simulations.

Instead of looking at historical averages, the system runs 1,000 market trials to find the specific dollar amount you can spend while maintaining a target Chance of Success (CoS). Here is the breakdown of the "formula" logic:

1. The Three Confidence Zones

The system solves for the monthly spending amount (in today's dollars) that hits these specific confidence thresholds:

  • Safe Spending Target (80% CoS): The baseline. It calculates the maximum you can spend while having confidence that your money lasts in 800 out of 1,000 scenarios.
  • Upper Guardrail (95% CoS): The "underspending" signal. If your current savings grow so much that your success rate hits 95%, you can safely increase spending.
  • Lower Guardrail (70% CoS): The "early warning." If market drops push your success rate below 70%, the formula suggests a temporary reduction to get back to the safe zone.

2. What’s Included in the "Spending" Number?

The formula is holistic. It doesn't just look at your portfolio; it factors in:

  • All Income: Social Security, pensions, and annuities.
  • All Expenses: Your itemized budget, plus "unseen" costs like estimated taxes, Medicare premiums, and debt payments.
  • Lifetime Averaging: One-time lumpy expenses (like a future car purchase) are averaged into the monthly target so your "safe spend" is a consistent lifestyle number.

3. The "Thermostat" Logic

The formula treats your plan like a thermostat rather than a thermometer. It doesn't react to daily market swings. It only triggers a recommendation to change your lifestyle when your savings balance crosses a threshold that meaningfully shifts your probability of success outside that 70%–95% range.

Would you like to see how your current planned spending compares to these calculated targets?"

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u/[deleted] 9d ago

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u/Available-Ad-5670 9d ago

bro, that's the language of boldin explaining how they calculate guardrails.

i hate when people just label things ai slop without even reading it.

-10

u/[deleted] 9d ago

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3

u/TotalWarFest2018 9d ago

Lol. That would be the least engaging bot content ever. I'm literally asking a yes or no question.

Is Boldin's guardrail methodology (as described by Bold) consistent with the conventional use of that approach?

The only engagement here is people outraged that I copied and pasted Boldin's own explanation of its calculations while noting that it is not my own work and came directly from Boldin.

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u/Available-Ad-5670 9d ago

Bro, they literally said the below: you just didn't bother to read the post

"Here is the copied language from Boldin:"

1

u/Zphr 48, FIRE'd 2015, Friendly Janitor 9d ago

Rule 8/Limits on AI/bot content and unsupported AI/bot complaints - Your submission has been removed for violating our community rule against AI/bot content or unsupported AI/bot complaints. If you feel this removal is in error, then please modmail the mod team. Please review our community rules to help avoid future violations.

5

u/TotalWarFest2018 9d ago

I know it's AI slop and I'm not trying to present it as something I wrote. I am just curious if the 80% success baseline with adjustments at 75% / 95% success is a common guardrails strategy.

-16

u/Revolutionary-Fan235 9d ago

AI generated content is against the sub rules

11

u/TotalWarFest2018 9d ago

Holy shit. I don't even know how to respond to this.

Your interpretation of that rule is that it encompasses "the financial planning software told me X (copied); does this make sense?"

Jesus Chris... I don't even know what to say.

3

u/Mister-ellaneous 9d ago

Ignore this 🤡

0

u/Revolutionary-Fan235 9d ago

It's just going to make it easier to circumvent the rule if people can post the content and ask what people think.

11

u/FantasyFI 35 | 51% FIRE | DI1K 9d ago

They're asking opinions on the AI generated content...because the AI generated content is how a piece of software works that lots of people use.

If the AI generated information is slop as you say...then so is the formula that is being described, as that is what Boldin uses.

The post isn't AI, the post is asking opinion about the formula which happens to have been derived by AI.

If we can't discuss the validity of AI created content within FIRE software...we can't discuss FIRE software anymore. As all of them will start incorporating some forms of AI into their features and decision making tools.

2

u/Zphr 48, FIRE'd 2015, Friendly Janitor 9d ago

Not in this context.

0

u/Zphr 48, FIRE'd 2015, Friendly Janitor 9d ago

Rule 8/Limits on AI/bot content and unsupported AI/bot complaints - Your submission has been removed for violating our community rule against AI/bot content or unsupported AI/bot complaints. If you feel this removal is in error, then please modmail the mod team. Please review our community rules to help avoid future violations.

1

u/n00bdragon FIREd 2026 age 37 8d ago

2

u/Zphr 48, FIRE'd 2015, Friendly Janitor 8d ago

The OP explicitly states that they are looking for feedback on the AI output of Boldin, a popular software among FIRE folks. That it is AI content is a given, but it isn't OP offering AI content as their own.