Using Decision Science in Investing: Masters in Business with Omar Aguilar
Aguilar connects decision science and investor behavior to practical portfolio choices, from retirement withdrawals and rebalancing to diversification and the risks of concentrated momentum trades. He discusses Schwab’s investment products, the spread of AI spending beyond technology, and how tariffs, corporate balance sheets, and economic support have shaped the expansion. He believes the cycle is nearing the end of its seven-year run and expects U.S. outperformance to become harder to sustain, while favoring high-quality intermediate bonds over taking credit risk.
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Read the Full SummaryKey Takeaways
Aguilar says AI investment has expanded from hyperscalers into data centers and semiconductors, then into sectors such as healthcare, financials, and industrials; he also says AI emerged after his original forecast and helped extend the expansion. He expects profitability to be an important measure for investors next year.
Aguilar sees AI making advisors more efficient, freeing them to understand clients’ preferences and build personalized relationships rather than relying only on identifying investment needs. Schwab’s customized managed accounts, ETFs, and mutual funds reflect that approach, which he says helped the business reach $1.9 trillion in assets.
Aguilar considers tariffs inflationary, but says exemptions, negotiations, implementation difficulties, and uncertainty over possible Supreme Court action have limited their impact so far; strong corporate balance sheets have also let companies absorb some higher input costs. Separately, he says some goods costs are gradually rising even though the inflation rate seems stable.
Aguilar argues that retirement withdrawals should reflect needs, inflation, real growth, and interest rates rather than defaulting to a fixed 4%; he says that rate may not cover more than 25 years of retirement liabilities, especially with inflation. He also emphasizes early saving and employer matching, while noting that Schwab developed dividend strategies and liquidity-based money market funds with retiring baby boomers’ income needs in mind.
Aguilar says Schwab built core ETFs and beta and smart-beta exposures around transparency, liquidity, low cost, and accessibility, and that roughly 35% of the firm’s net new ETF assets come from outside Schwab. He points to the dividend ETF launched in 2011—which surpassed $100 billion and became the world’s largest dividend ETF—as an example of appeal based on 100 high-quality dividend payers and consistent results, rather than the lowest cost or highest yield.
TECHNOLOGY
“If you think about in the world of AI, the need is basically what the computer is going to tell you…”—
“And at the same time, we say, Okay, well, we also need to start building technology to offer these not just in ETFs and mutual funds, but also in managed…”—
ECONOMY
“I think we never expected that it was going to continue as far as it has been so far…”—
“It has had probably less impact than we all thought. It has an impact, and it has had an impact, A lot of exceptions and exemptions…”—
MARKETS
“Now they're called data science. Back then, it was statistics. In terms of how you use those models for making decisions…”—
“And a lot of that had to do because, if you think about it, depending on the level of interest rates, 4% may be, it is right now, probably less…”—
“And Bayesian statistics is based on a theorem called by Reverend Thomas Bayes way back when…”—
FORECASTS
“Especially because relative to the rest of the world, The US looked incredibly attractive…”—

Omar Aguilar’s Career
Aguilar traces his path from academic decision science through Bankers Trust, Merrill Lynch, Lehman Brothers, and Financial Engines to Schwab.
Quantitative Decision Models
Aguilar explains how his statistical research was applied to currency, equity, and asset-allocation decisions, and how Wall Street mergers shaped his career.
Retirement Withdrawal Strategy
Aguilar argues that a fixed 4% withdrawal rule ignores changing rates, inflation, longevity, and individual income needs, making early saving and adaptable planning essential.
Bayesian Investor Behavior
Aguilar links Bayesian statistics to everyday decisions and says investors combine prior experience, new information, emotion, and analysis when choosing how to act.
Schwab Bias Coaching
Schwab educates advisors about client biases and helps them reconcile what investors want with what research and financial planning indicate they need.
Schwab Asset Management
Aguilar describes building Schwab’s transparent, accessible, low-cost investment business, including ETFs, income products, and customized managed accounts.
Scale and Dividend ETFs
Schwab emphasizes client choice and low-cost, transparent products; Aguilar cites the firm’s dividend ETF as a large, quality-focused strategy rather than a high-yield chase.
Alternatives and Liquidity
Aguilar says alternatives can diversify suitable wealthy portfolios, but private-market returns and liquidity limits are not directly comparable with public securities.
AI in Wealth Management
Schwab is applying AI to employee efficiency, client service, account analytics, and research, while Aguilar expects human relationships to remain central to advice.
AI Market Concentration
Aguilar sees some rotation away from mega-cap technology but warns that narrow leadership and renewed momentum trading make diversification important.
AI Capital Spending
AI investment is spreading into healthcare, financials, and industrials, while the key test ahead will be whether the spending produces profitable returns.
Seven-Year Expansion Outlook
Aguilar attributes the extended U.S. expansion to AI spending, stable labor, fiscal and monetary support, and strong balance sheets, but sees the cycle nearing its end.
Tariffs and Inflation
Tariffs have had less effect than expected because of exemptions and implementation delays, though companies’ ability to absorb higher input costs may be fading.
Intermediate Bond Preference
Aguilar favors high-quality intermediate bonds over credit risk, saying higher Treasury yields improve the balance of potential returns and duration risk.
Investor Biases and Discipline
Aguilar identifies herding, recency, confirmation, and home-country biases, then recommends staying invested, diversified, and disciplined through pre-established rules.
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Important Disclaimers
Not Investment Advice: For education only — not financial, tax or legal advice.
AI-Generated: Made by AI from source transcripts and may contain errors.
No Guarantees: Past performance does not predict future results; investing carries risk.
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