Ep60: Corey Hoffstein – Beware of Pure Story-Driven Investing

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Guest profile

Corey Hoffstein is a co-founder of and chief investment officer at Newfound Research, a quantitative asset management firm founded in August 2008 that is specializing in risk-managed, tactical asset allocation strategies. At Newfound, Corey is responsible for portfolio management, oversight of research and communication of the firm’s views to clients. He received his degree in BS in computer science from Cornell University and earned an MS in computational finance at Carnegie Mellon University.

Early investing foray – road to the fall

Corey’s tale takes place about a decade ago when he was starting out in investing. He thought he had erased the details of its telling as it was such a painful episode in his life. Back then he truly believed he was playing his part with considerable research about investing, starting with Benjamin Graham’s classic titles, Security Analysis and The Intelligent Investor and anything available by Warren Buffett. From this he became engrossed in the analysis of individual securities and developed the idea that the “real” opportunity was in micro-cap stocks, finding that special stock no one had found and holding it until the market realizes he is a genius and rewards him in kind.

Green investor’s vision blurred in Internet’s salad days

As an impressionable young investor in the days when the Internet was also young, he was greatly taken by all these investment boards, some prominent and large, whereas some had a dozen or so members, all completely anonymous people sharing ideas. In the sort of blind date equivalent of seeking financial advice, he got to know the people, their investment styles, their stock picks and, eventually, that they could be totally making it all up. But, he built a measure of trust in this hidden little world and on one such board a hot tip was suggested, a pink-sheets, over-the-counter (OTC) stock in a company known as Deep Down Incorporated (DPDW.PK, DPDW.US). DPDW is (still) a deep-sea oil exploration and production-services-related company that builds underwater umbilical cords and submarine drones to explore wells. It either leases or sells such technology to big companies.

‘Underdog target for a buyout’ thesis predicts ‘gold’ 

His thesis was that Deep Down Inc. was a great R&D operation, a company that is always one big deal away from being “not just profitable, but ultra-profitable” and a sure-thing target for a buyout – an underdog team dealing with big-league industry players. For a time, his “inside scoop” delivered some joy as the stock’s price climbed in a short period, and he took the bait.


“People on these web forums are claiming they’re talking to the CEO and they’re sharing the inside scoop and so you really feel like you have your pulse on it. In retrospect, I didn’t have my pulse on anything but I thought I did and so I watched the stock climb from say 40 cents to 80 cents and I think: ‘You wanna know what? This is happening!’ One of those situations where price confirmed my narrative that probably should’ve been a sign, I probably should have dug a little deeper, didn’t even really understand the fundamentals I was getting involved in. This was pure story-driven investing and I bought. I then watched the stock go from about 80 cents to about a US$1.20.”

Corey Hoffstein


Early success on half-baked research spells peril

Corey believes now that these types of early gains are among the worst things that can happen when an investor has made an ill-conceived investment because it ramps up their overconfidence gene and they become so attached to belief in their own abilities. Corey was no exception. Equating luck with genius, and ignoring his own profit target, he said to himself again:


“You wanna know what? The story’s only getting better … now I think we’re going to get to $5.”
Corey Hoffstein


His perceived future was getting rosier because the price was supporting all the myths he had built around the stock. So instead of taking some risk off the table, and banking his gains, he ploughed more funds back in. He then saw the stock price decline. Again he interpreted this as other people taking profit, some pain before the big, long-term gain. But it kept sliding. Did he stop? No. Rather, he thought:


“‘This is a buying opportunity’. So not only did I buy at the top, I then doubled down on the way down, which you know, again, in retrospect, is not such a smart move because I really didn’t understand what I was buying at all … it just continued to dwindle and it probably got back to around 40 cents and stayed at 40 cents.”
Corey Hoffstein


By this time, Corey was so appalled that he stopped checking the price. After three or four years, it was still at 40 cents and he finally let it go. He added that it was not actually his worst investment by dollar value but it was a case in which he made every mistake textbooks say he could have.

Deep Down Inc. has run along the sea floor since 2004

The chart above follows the fortunes of  Deep Down Incorporated, particularly during the period covered by Corey’s involvement with the stock. Image: TradingView

What is a ‘penny stock trading on a pink sheet’?

A pink sheet is a type of stock that is not trading on the main exchanges, such as The New York Stock Exchange or the Nasdaq and therefore it does not meet the regulatory and exchange requirements to be listed on the main courses. It is also OTC traded, which means it is very illiquid (difficult to sell and turn into cash). And, if trusting in web-forum strangers’ was not bad enough, Corey invested in a penny stock. Rather than seeing this as a red flag at the start, it was instead was one of the main reasons that the stock seduced him to invest in it. His belief was that such a stock offered more opportunity for upside. But the turn of events proved otherwise.

Corey’s Takeaways

1. Invest in a manner that aligns with your personality, both the positives and the negatives. If you are someone who truly enjoys the process of understanding company fundamentals, a more discretionary value approach can be totally warranted and appropriate. For Corey personally, he had to see the negative side, which was that he was quite vulnerable to a stock’s story, which thus put him at risk of being an emotional investor. His takeaway, in essence, was what makes him more successful today in that it drove him to find a way to invest in an unemotional manner. How did he do that?

2. Adopt a fully quantitative methodology. This is one you can control from A to Z and would certainly ensure that you are not going to be drawn in and seduced by your own emotions.


“Everything I do today is quant. It’s not quant because I’m a robot. I’m quant because I’m emotional and I need those rules to make sure I stay on the straight and narrow.”

Corey Hoffstein


3. Recognize that mistakes are going to happen with investing. It is impossible to avoid all mistakes, even when you are very knowledgeable and aware of them. You are working without all the information, you cannot know who is necessarily on the other side of a trade. It is very important to always consider that you are going to be wrong, and not just wrong once, but many times. Survival, ultimately, is key.

Andrew’s Takeaways

The team at A.Stotz investment and Andrew have identified six core mistakes that investors make. Corey made three (although he feels his story could cover them all).

1. Failed to do their own research. We never in the world of investing would invest without doing our own research.

2. Failed to properly assess risk. Risk, as he often says, is a separate item. In this case, there were the risks to liquidity and the structures that were insufficiently put in place and then ignored for the moment that the shares started going down and the investor’s response to that moment.

3. Misplaced trust. Corey placed trust in an anonymous forum where people can be releasing different stories for different reasons. They could have neither been investing themselves nor risking anything in what they were proposing and that Corey had no way of knowing it. He pointed out that there are honest people who are sharing their investment experience on the Internet and many are just unable to share it accurately.


“I looked on your (Corey’s) website and I see that you’re GIPS® compliant with the CFA, the Global Investment Performance Standard. And basically what GIPS® compliance requires is that you look at your complete portfolio, of all your different asset classes. You don’t omit things that you don’t want to put in.”
Andrew Stotz


Even good investors engaging with these types of web boards or groups on sites such as Facebook groups and other types, even good people, find out how it is hard for them to be truthful.


“That doesn’t even consider the liars and the cheats out there that are everywhere. And I can’t tell you the number of times that people have come to me about how they’re starting to trade in forex. We did have one story already on My Worst Investment Ever where he lost most of his money trading in forex. But I just think of all areas … forex … you’re betting against the central banks of the world. And what’s your angle?”
Andrew Stotz

Final words from Corey

1. Investors should really make sure they are well diversified. They should also think about all the ways that trade can go against them and their criteria for cutting losses.

2. It’s not going to be your only bad trade. You’re going to make many throughout your career. It’s not about not making them. It’s making sure you can survive them.

How to avoid having the same fate?

“Don’t buy penny stocks based on someone else’s recommendation.”

“First and foremost, acknowledge your own weaknesses. For me, that very much meant acknowledging that I could be very much drawn in by a narrative, was clearly willing to make mental shortcuts in my analysis and allow others to do the work for me at that point in my investing career. And so I wanted to make sure that could never happen again.”

Final words from Andrew


“There’s great people out there, men and women, who can find great investment ideas and make a ton of money from them without having all the structures in place. But for me, it makes me feel better. And I think the best thing in investing is that there’s space in investing for everybody with every style. So find your style and implement your style.”

Andrew Stotz


Connect with Corey Hoffstein:

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About the show & host, Andrew Stotz

Welcome to My Worst Investment Ever podcast hosted by Your Worst Podcast Host, Andrew Stotz, where you will hear stories of loss to keep you winning. In our community, we know that to win in investing you must take the risk, but to win big, you’ve got to reduce it.

Your Worst Podcast Host, Andrew Stotz, Ph.D., CFA, is also the CEO of A. Stotz Investment Research and A. Stotz Academy, which helps people create, grow, measure, and protect their wealth.

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