Uncentive Research Notes & Markets

What Stocks Should I Buy?

TL;DR - This isn’t financial advice, everyone should do their own research. With that in mind, consider mixing up the selection of assets and funds you buy, and once you buy your Stocks or ETFs you should forget about them for a while. As an employee at an investment firm, I often get asked questions like “What stocks should I buy?” and “What i... Read more

Don't obsess over your long(er)-term investments

Some people are in the habit of checking their phone or email every minute or two. Similarly, I have colleagues, friends and family who check their slow-moving investments - like their 401ks - on a near-daily basis. I do this too, and although I trade several times a week at minimum, I suspect I might be checking the long-term stuff too often ... Read more

Backtests don't account for Fear, Uncertainty and Doubt

Backtesting is an important step in creating trading automated or systematic strategies. Google “best practices for backtesting” and you’ll find many an article or blog post cautioning against data snooping, over-fitting, and look-ahead bias. Look-ahead bias in particular is defined according to Investopedia as: […] using information or data... Read more

Markov Chains

A Markov Chain is a stochastic model describing a sequence of possible events in which the probability of each event depends only on the state attained in the previous event. From Wikipedia: A diagram representing a two-state Markov process, with the states labelled E and A. Each number represents the probability of the Markov process changin... Read more

Matrix Operations

For an intro to matrices in general, see this post Multiplication Matrix multiplication is done by repetitive vector multiplication. Multiplication of two vectors is… \[\begin{bmatrix}a_1 & a_2 & a_3 \end{bmatrix}\begin{bmatrix}a_1\\b_1\\c_1\end{bmatrix} = a_1b_1 + a_2b_2 + a_3b_3 + ... + a_nb_n = \sum^{n}_{i=1}a_ib_i\] If we are deno... Read more