Potomac Funds VOO Surge
Potomac Fund Management Significantly Expands VOO Holding to 61.3% of Portfolio
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Potomac Fund Management Inc. said its new VOO stake is extremely concentrated: the Vanguard S&P 500 ETF makes up about 61.3% of its portfolio and is its largest holding, and Potomac owned roughly 0.20% of VOO outstanding at the end of the reporting period.
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For VTI, Potomac’s position sizing and ranking were detailed in the 13F: Vanguard Total Stock Market ETF represents about 0.8% of Potomac’s portfolio and is its 14th-largest holding, after adding 7,531 shares to reach 68,273 shares (worth $22.89 million).
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Vernal Point Advisors’ emerging-markets allocation (VWO) was also characterized by portfolio share and placement: the ETF accounts for about 0.6% of its holdings and is its 13th-biggest position, following the purchase of 27,023 shares valued at approximately $1.453 million.
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In corporate bonds (VCIT), Portfolio Resources Advisor Group Inc. disclosed that Vanguard Intermediate-Term Corporate Bond ETF makes up about 0.9% of its portfolio and is its 25th-largest holding after buying 10,634 shares worth about $891,000. Other investors also showed unusually large swings—e.g., First Horizon Corp increased its VCIT stake by 323.9%.
Potomac Fund Management has placed a massive bet on U.S. stocks. The firm bought roughly 2.65 million shares of the Vanguard S&P 500 ETF (VOO), worth about $1.66 billion, making VOO a dominant 61.3% of its entire portfolio, according to SEC Filings via Fintel.
The move comes as VOO crossed a historic milestone: the fund surpassed $1 trillion in total assets in June 2026, according to The Motley Fool. That makes it the first ETF ever to reach that level — a sign of just how much money is flowing into low-cost index funds.
Potomac Puts 61% of Its Money Into One ETF
Potomac's VOO stake is unusually concentrated. Most diversified investment firms spread money across dozens of positions. Potomac put more than three-fifths of its portfolio into a single fund. The firm owned about 0.20% of all VOO shares outstanding at the end of the reporting period, per SEC Filings via Fintel.
Potomac also added to its Vanguard Total Stock Market ETF (VTI) position, buying 7,531 more shares. That brings its total VTI stake to 68,273 shares, worth about $22.89 million — a 12.4% increase. VTI now makes up about 0.8% of Potomac's portfolio and is its 14th-largest holding.
Potomac's CIO Says This Is a Tactical, Rules-Based Move
Potomac frames this not as a passive "buy and hold" decision. CIO Dan Russo has said the firm's models are built to "avoid the moves that cause lasting damage," according to Potomac Funds. The firm uses systematic signals — trend, market breadth, and intermarket data — to decide when to be in or out of the market.
Russo has said publicly that "cash is a position" — meaning Potomac could theoretically shift its entire portfolio to cash if its signals turn bearish. The current 61% VOO allocation reflects a bullish signal, not a permanent strategy. The S&P 500 hit an all-time high of 7,620 on June 2, 2026, per The Motley Fool.
Other Firms Bet on Emerging Markets and Corporate Bonds
Potomac was not the only firm reshuffling its Vanguard holdings. Vernal Point Advisors opened a brand-new position in the Vanguard FTSE Emerging Markets ETF (VWO), buying 27,023 shares worth about $1.45 million. VWO now makes up 0.6% of Vernal Point's portfolio and is its 13th-biggest holding, per Holdings Channel.
Portfolio Resources Advisor Group bought 10,634 shares of the Vanguard Intermediate-Term Corporate Bond ETF (VCIT), worth roughly $891,000. That is now 0.9% of its portfolio. In a striking separate move, First Horizon Corp grew its VCIT stake by 323.9%, per Holdings Channel. Some analysts see big bond buys as a sign that smart money is preparing for a possible market slowdown.
High Valuations Raise Questions About Timing
Not everyone is cheering the inflows. The Shiller CAPE ratio — a measure of how expensive stocks are compared to long-term earnings — has hit 41. That matches levels last seen during the 1999 dot-com bubble, according to The Motley Fool. The higher this number, the more likely future returns may disappoint.
Still, the overall ETF industry keeps growing. The U.S. ETF market hit $15.7 trillion in mid-2026, with $837 billion in new money flowing in year-to-date, according to ETFGI. Institutions are using ETFs like VOO not just as long-term holdings, but as quick, liquid tools to move billions in and out of markets fast.
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