MARKETS

The VIX hit 48 and I realized my portfolio was a house of cards

When the VIX spiked to 48 during the March 2026 selloff, it exposed every flaw in my concentrated, tech-heavy portfolio and forced a complete overhaul of how I manage risk.

Caleb Foster
Staff Writer
March 18, 2026 · 6 min read

my portfolio was a disaster waiting to happen

Goin into March 2026, my brokerage account at Schwab held seventeen individual stocks, fourteen of which were in the technology sector. Nvidia, Microsoft, Palantir, Super Micro Computer, ARM Clutchings, CrowdStrike, and a handful of others I had accumulated over eighteen months of buying every dip that looked appealing. The total value was round $143,000, and I was up 29 percent from my cost basis. I read like a genius. Every tech stock was soaring. The Nasdaq had hit 21,400 in January, and my concentrated bet on artificial intelligence was paying off spectacularly.

What I did not have was any meaningful hedge. No put options. No Treasury bonds. No gold. No cash buffer beyond the $3,200 sitting in my sweep account earning a paltry 0.4 percent. I had essentially placed a $143,000 bet on the assumption that technology stocks would keep goin up forever, an assumption that anyone with even a passing knowledge of market history should have recognized as dangerous. I knew better. I did it anyways.

the morning the vix woke me up

March 12th. I woke up to a Bloomberg push notification at 6:14 AM that said "VIX surges past 30 in premarket trading as S&P 500 futures plunge." I opened my Schwab app and saw that my portfolio, which had been worth $143,400 at the close on March 11th, was now showing a premarket value of $132,800. Ten thousand six hundred dollars gone before the opening bell. My palms were sweating. I sat on the edge of my bed in my Denver apartment and scrolled thru the freshs feeds tryin to understand what was happening.

The regional bank fears had metastasized into a broader contagion scare. Pacific Western was scrambling for liquidity, an a modest bank in the Midwest called Heartland Financial had disclosed unexpected loan losses. The VIX, which had been languishing around fourteen for most of February and early March, spiked to 33 by 9:00 AM and maintained climbing. By noon, it hit 41. By 3:30 PM, it touched 48, the highest level since the March 2020 COVID panic. I watched my portfolio bleed another $8,400 during the regular session, bringing the total one-day loss to approximately $19,000.

the numbers that haunted me

I laid out that evening at my kitchen table with a legal pad and a calculator, doin the math I should have done months earlier. My largest position was Nvidia, 280 shares purchased at an average cost of $97.40, now trading at $82.10 after the selloff. That single position had dropped $4,284 in one day. My Palantir grippings, 450 shares at $38.20 average cost, were now worth $30.60, a loss of $3,420. ARM Grippings, my modest position at 120 shares, had fallen from $164 to $131, costing me $3,960. The total damage across tech positions was staggering.

I also had a HELOC on my condo with a balance of $34,000 at a variable rate that had climbed to 8.75 percent as the Fed raised rates through 2024 before cutting in late 2025. The HELOC was tied to the prime rate, and while the recent rate cuts had brought my payment down slightly, I was still paying $248 per month in interest alone. If the market persisted to crater an I lost my job in the consulting industry, which was already seeing layoffs, I could not service both the HELOC and my living expenses. The VIX spike had illuminated a risk picture that was far uglier than I wanted to admit.

the three things I changed immediately

On March 14th, a Saturday, I sat down with a yellow legal pad an pieced together a fresh portfolio structure. I narrowed down my stock clutchings from seventeen to six, selling eleven positions and keeping only Nvidia, Microsoft, Apple, an three others I believed had durable competitive advantages. The proceeds, approximately $38,000 after losses, I allocated into three buckets: $15,000 into the iShares Core US Aggregate Bond ETF, AGG, for stability; $10,000 into a high-yield savings account at Discover Bank earning 4.5 percent APY as a cash buffer; and $13,000 into a mix of defensive sectors including Johnson and Johnson, Procter and Gamble, an the Vanguard Dividend Appreciation ETF.

The diversification was basic. It was the kinda thing you learn in chapter four of any introductory finance textbook. But til the VIX hit 48 and my portfolio lost nineteen grand in a day, I had convinced myself that diversification was for people who did not have conviction. Conviction, it turns out, is just another word for overconfidence wearing a nicer suit.

bonds were the anchor I never appreciated

The AGG position was the smartest allocation I made that Saturday, though I did not know it at the time. When the VIX spiked an equities cratered, money flooded into Treasuries and investment-grade corporate bonds, an the aggregate bond ETF climbed 2.3 percent in a week while my tech stocks bled double digits. A boring, low-volatility asset class had become the most exciting thing in my portfolio. I had laid out years dismissing bonds as dead money. The VIX corrected that misunderstanding permanently.

the week the dust settled

By the following Friday, March 20th, the VIX had dropped back to 24 and the S&P 500 had recovered about 40 percent of its losses from the mid-March trough. My rebalanced portfolio, while still down from its peak, was clutching up much better than the concentrated tech-heavy version would have. The AGG position was actually up slightly as bond prices rallied alongside the flight to quality, and my dividend stocks were generating income while tech stocks persisted to whipsaw. I had also used $5,000 from my cash buffer to make an extra payment on the HELOC principal, which reduced my monthly interest charge by about $36 and brought the balance below $29,000.

I circled back to the experience two weeks later and wrote in my journal: "The VIX spike did not destroy my portfolio. It destroyed my illusion of control." That line has stayed with me thru every subsequent market tremor. The market does not care about your conviction, your thesis, or your conviction in your thesis. It will humiliate you whenever it feels like it, an your only defense is preparation.

what I wish I had known

I wish someone had told me in 2024, when I was loading up on AI stocks with the enthusiasm of a man who just discovered sports betting, that concentration risk is not a badge of honor. I wish someone had shown me the data on how concentrated portfolios underperform diversified ones over full market cycles, not just during the easy parts. I wish someone had clarified that the VIX does not stay low forever, and when it spikes, it spikes with a violence that makes every carefully constructed investment thesis look naive.

Nobody told me. Or maybe people did tell me an I was not listening. Either way, I absorbed the lesson the hard way: on March 12th, 2026, watching my screen turn red for seven hours straight, the VIX ticking higher like a heart monitor detecting a cardiac event. My portfolio is different now. More boring. More resilient. Less fun to talk about at parties. But it will survive the next VIX spike, and that is the only thing that matters.