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Building Portfolios That Can Withstand Inflation’s Impact

The steady erosion of purchasing power through inflation

Tony Blagrove, CFA, CFP®
September 5, 2025
  • financial planning

Natural disasters come in different forms – some strike suddenly like earthquakes, while others work slowly like erosion. Both require thoughtful preparation and defensive strategies. The same principle applies to economic challenges facing families and businesses. Not all financial threats arrive as dramatic crises; many unfold gradually over extended periods. Inflation exemplifies this pattern, presenting both immediate price spikes and the steady weakening of purchasing power that currently influences financial markets.

Those who experienced the inflationary periods of the 1970s and early 1980s, or the recent post-pandemic price increases, will recognize these dynamics. Inflation remains more persistent than desired, with ongoing concerns that tariffs could elevate consumer costs. Yet current inflation coincides with robust employment levels, strong consumer spending, and solid corporate earnings. This combination creates a nuanced landscape for investors and policymakers as they navigate the balance between economic growth and price stability.

Instead of waiting for inflation to escalate into a larger issue, prudent long-term investors should construct portfolios capable of weathering various scenarios while maintaining focus on their financial objectives. What insights do current inflation data provide about economic conditions and investment strategies?

The steady erosion of purchasing power through inflation

The majority of investors, savers, and retirees recognize that combating inflation represents a fundamental investment objective. Preserving the buying power of a portfolio or savings account through various investment vehicles – whether equities, bonds, certificates of deposit, or alternative investments – remains essential for securing future financial comfort. The accompanying chart illustrates this reality starkly. An item that cost $1 one hundred years ago now requires $18. The data also reveals that these pricing pressures intensified during the 1970s and have resurged recently.

This perspective might suggest that zero inflation – or even deflation with declining prices – would benefit consumers. Yet inflation encompasses more than individual spending costs; it reflects broader economic vitality. Contemporary economic principles support maintaining low but positive inflation, typically around 2%, as the optimal framework for both individuals and the overall economy.

Moderate inflation provides central banks with policy flexibility, encouraging spending and investment when economically beneficial. Furthermore, modest inflation helps avoid deflationary cycles, where falling prices prompt consumers to postpone purchases in anticipation of even lower future costs.

Therefore, distinguishing between individual and economy-wide impacts proves crucial. While 2-3% inflation may historically support healthy growth conditions, even these moderate levels can damage savers’ positions. Though these rates appear reasonable compared to the double-digit inflation of the 1970s or recent post-pandemic increases, they accumulate significantly over time.

Consider that 3% annual inflation doubles costs approximately every 24 years. This means $100,000 in current purchasing power would need $200,000 in two decades – well within typical retirement timeframes. This erosion particularly challenges retirees and cash holders. For all investors, inflation establishes a “hurdle rate” that investment returns must surpass to build real wealth.

Persistent inflation patterns continue

Regarding today’s inflationary climate, many express concern about the potential “earthquake” impact of tariffs on pricing. The recent Producer Price Index report demonstrates that business-level prices increased sharply in July. Wholesale costs jumped 0.9%, marking the largest monthly gain since June 2022 and exceeding economist predictions. Goods prices advanced 0.7% during this period, while services surged 1.1% in a single month.1

These figures carry significance because wholesale price increases typically appear in consumer prices several months later, as inflation moves through supply chains. This aligns with companies initially absorbing tariff costs but potentially beginning to transfer higher expenses to customers.

The most recent Consumer Price Index data shows less dramatic increases but confirms inflation’s stubborn persistence. Current figures indicate prices rose 2.7% annually for overall inflation, or 3.1% excluding food and energy prices, which remained flat or declined. Housing costs drove much of this increase.2

Beyond abstract economic understanding, these statistics directly affect household budgets. Price increases appear in areas consumers notice most: restaurant meals increased 3.9% annually, medical care rose 3.5%, and auto insurance jumped 5.3%. Even household goods like furniture climbed 3.4%, adding strain to family finances already pressured by years of elevated prices.

Strategic asset allocation essential for inflation protection

Though these increases are significant, inflation remains well below the double-digit levels from 2021 to 2022. Nevertheless, even if tariffs don’t trigger sudden inflation spikes, they may elevate average price levels over time, diminishing cash value. This becomes particularly problematic when wage growth lags price increases and investors lack long-term allocations capable of exceeding inflation rates.

Understanding inflation’s portfolio implications remains vital. The chart demonstrates that average cash interest earnings have failed to match inflation. Additionally, money market fund holdings remain at record highs of $7.1 trillion, despite declining short-term rates.3

While past performance doesn’t guarantee future results, historical data shows both equities and bonds have surpassed inflation over extended periods, as the initial chart indicates. However, stocks can experience volatility during inflationary periods, as seen in 2022. This explains why balanced asset class exposure that can handle both inflation and market fluctuations helps investors maintain course.

Most critically, investors should avoid making dramatic portfolio adjustments based on monthly inflation reports or tariff concerns. While ensuring portfolios are positioned for various scenarios remains important, overreacting to short-term data frequently results in poor timing decisions that can undermine long-term financial objectives.

The bottom line? Inflation’s steady erosion of buying power presents a fundamental investment challenge. Maintaining a well-balanced portfolio designed to generate both income and growth offers the most effective path to achieving financial success.


1. https://www.bls.gov/news.release/ppi.nr0.htm

2. https://www.bls.gov/news.release/cpi.t01.htm

3. https://www.ici.org/research/stats/mmf

Tony Blagrove, CFA, CFP
Founder, CEO
Direct: (650) 397.2395
Tony.Blagrove@TravekaWealth.com

This material is for informational purposes only and does not constitute an offer to sell or the solicitation of an offer to purchase any security or investment product or services. The content of this material is provided solely for your personal use and shall not be deemed to provide access to any particular transaction or investment opportunity. Traveka Wealth, LLC (“Traveka”) does not intend the information in this material to be investment advice, and the information presented in this material should not be relied upon to make an investment decision. Any third-party information contained herein was prepared by sources deemed to be reliable but is not guaranteed.  All opinions expressed by the participants are solely opinions and should not be relied upon as potential or actual results.

Certain of the information contained herein has been obtained from third- party sources and has not been independently verified. It is made available on an “as is” basis without warranty. Any strategies or investment programs described in this presentation are provided for educational purposes only and are not necessarily indicative of securities offered for sale or private placement offerings available to any investor. 

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