Investing stories usually revolve around things of clinical detachment—charts, financial ratios, and spreadsheets.

However, a recent, raw report from the ThumbTack Fund (TTF) reveals a riveting human story of bad luck, a daring bet and a hard-earned partial recovery.

Call frm Margin1.26The author, ThumbTack Investor, a medical professional in his 40s, recounts a harrowing episode in early December 2025

"On the 3rd December 2025, whilst I was fast asleep at like 35,000 feet in the air, unbeknown to me… TTF was getting savagely ravaged by Mr Market with margin calls hitting fast and furiously, left right and centre."

He had made a massive bet on a biotech company facing what he considers to be a binary event, and recalled the psychological trap of overconfidence using a poker analogy:

"It’s 1 of those things: someone at the table has a full house and goes all in. I tried to suppress a smile while looking at my hand of 4 of a kind, and called his bluff. 

"As I prepared to scoop up all the chips on the table, another dude shows his hand and it was a straight flush. What can I say? Wouldn’t you bet big with a 4 of a kind hand? Yet there are no certainties in life. Shit happens."

It was a leveraged position that could not withstand temporary volatility while he was incommunicado.

"Jesus man. Someone up there really hates me. Or at least, deems it funny enough to see how TTI would react to seeing his portfolio net worth crash on day 1 of his holidays. What a troll."

By the time he landed, the
ThumbTack Fund was being "savagely ravaged by Mr Market with margin calls hitting fast and furiously"
.

In just four hours, the fund’s net worth plummeted from USD 6.7 million to USD 5.3 million.

This USD 1.4 million vaporization was made worse by automated liquidations; the author estimates that USD 600,000 of the loss could have been avoided if he hadn't been mid-air and unreachable.

Perhaps most poignant is the author's personal struggle.

This crisis occurred on Day 1 of a 12-day family holiday. To keep from ruining the trip for his parents and in-laws, he had to "suck it all in, put on a smile, and carry on".

Despite the "savage" liquidations that spanned pages of trade logs, the report ends on a surprisingly resilient note.

Since returning to Singapore, TTI has clawed back USD 700,000 of the losses through intensive trading.

And remarkably, even after this "disastrous" December, the ThumbTack Fund finished 2025 with a +33.90% return, significantly outperforming the SPY (+17.72%) and the STI (+24.75%).

"Most folks, when they get margin called, don’t get to live to tell the tale. It’s all gone.

"But I’m still around, TTF is still around, and to quote Mark Twain again: 'The reports of my demise are greatly exaggerated' ”.



Read the full TTF article here

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