By At the beginning of 2023, I wrote a New Year Planning: 2023 | Data Driven Everything (data-driven-everything.com). With a quarter already behind us, it’s time to reflect on my progress. I aspire to become a person with the following traits: I believe most of my friends would agree that I am trustworthy, as I’ve received …
Is the Modern Portfolio Theory Applicable to Managing Consumer Loan Portfolio?
Before I elaborate on the thoughts, I should give readers the typical risk management framework for existing customers used in consumer loans (In a mature market, the contribution of new users is relatively small). Users are segmented into different risk tiers corresponding to predicted default risks. It is similar to some credit rating agencies, like …
Summary On Bold vision: the untold story of Singapore’s reserves and its sovereign wealth fund
Recently, I have a chance to pick up a book on the history of GIC (Government of Singapore Investment Corporation). The book gives important backgrounds of the creation of GIC. In my opinion, it is a short history of Singapore’s reserve management and its currency. In 1965, Singapore separated from Malaysia to become an independent …
How I Stop Impulse Purchases?
In the last 2 years, I spent a lot of money on electronics and camera gear. Recently, I made an inventory list. I found that I have spent around HKD 250K. This is a large sum of money for me. I reflected on the reasons. First, it happens when I am stressed. Two years ago, …
How to Understand the Business Cycle Through Economic Indicators?
We read a lot about the economy in the news. They are like data points describing the state of the economy, such as GDP, capacity utilization, purchase managers’ index, cpi, etc. Without a general framework in mind, it is overwhelming. We need to have a framework in mind even if it may not be correct. …
Take Control of Your Time! Detox From Social Media.
Time is the most precious resource. With the advancement in technology, it becomes more difficult to safeguard time. I am an iPhone user. After checking the “Screen Time”, the top 3 most used apps are WeChat, Instagram, and YouTube (Actually, the 3rd is Safari. But it is less likely to waste time in Safari). In …
New Year Planning: 2023
The planning takes a top-down approach. It starts with the principles that seem right to me and ends with the specific tasks. Reflecting on how I did planning, I put too much emphasis on the details of a specific goal without explaining the motivation and general theme behind it. Principles are relatively harder to change …
Travel Observations: New York City
New York is a state Friends send me news on winter storm. In New York City, there was little snow. I learn that the total area of New York State is 141,000 KM2. That of New York City is 780 KM2. Why East Coast is Colder Than West Coast I first landed on San Francisco …
Some Confusing Experiences in Self-learning Maths
Don’t ask me why I would self-learn mathematics because sometimes I feel like it is a waste of time especially when I found the materials difficult. I feel that maths is the foundation of today’s science, and therefore, important. I feel that I lack training in maths. Not that I don’t know how to do …
Russell Paradox
This is just a sharing of an interesting paradox. I am definitely not an expert in Set Theory. If you want to learn more about the paradox, you may refer to the formal text on Set Theory. Consider the barber paradox in the picture above. The question asks “who shaves the barber?”. There are two …
