Confession on the trading floor

By , August 9, 2011 6:56 pm


Over one year studying Finance leaves me with these impressions:

  1. Finance saves my time trying to prove I am right; the focus is on proving my speculation wrong.
  2. Finance makes me comfortable replying "beats me" to a question I am clueless about, because "knowing" is the biggest self-injecting illusion and fallacy.
  3. Finance saves me from ‘philosophical’ questions such as "am I existing or am I living?" because mere existence in the market is already extraordinary luck.

Black-Scholes Options Pricing formula holds

By , August 9, 2011 6:56 pm

Actual Call and Put prices move inline with theoretical prices from Black-Scholes formula. This observation reflects that the formula is ubiquitously used in practice.

Data from Yahoo! Finance and Bloomberg

How to setup your Kindle to receive documents via 3G and Wi-Fi

By , August 9, 2011 6:55 pm

Read my Kindle 3 Review

You can view your documents on Kindle without plugging your Kindle in. All you have to do is send the document via email to your email and Amazon will automatically convert them to Kindle format. Click here to view formats Kindle 3 support.

You can also send one document to multiple Kindle recipient, as long as your email is approved by the Kindle owners.

You can setup these steps even before your Kindle arrives.

Why 140 is in appropriate for Vietnamese language

By , August 9, 2011 6:54 pm

The 140-character limit of micro-blogging platforms is inappropriate for Vietnamese language because:

  • A Vietnamese sentence has, on average, 21% more characters than an English sentence does. Methodology described below (*)
  • Vietnamese language typically contains more honorifics than English does

The reason why SMS in Vietnamese poses less of an issue is because Vietnamese texters use Vietnamese without diacritics.

Thus, imposing 140 for Vietnamese with diacritics limits expression of ideas and relationship.

(*) Methodology

  • I write a simple character-counting C program to count the characters
  • I run 250 sample English documents into the program. I then run the translation of those documents in Vietnamese
  • The sample contains a variety of topics such as Shakespeare, modern literature, technical documents, conversations, newspaper articles, journals
  • I then run a descriptive statistics on the results
  • The weighted-average length of a Vietnamese sentence is statistically significantly larger than that of an English sentence

A summary of Blink

By , August 9, 2011 6:54 pm

A summary of what I remember after reading Blink by Malcolm Gladwell

  • Subconscious navigates us more than we acknowledge / believe
  • Subconscious is Blink: two seconds, sometimes less
  • In some cases, too much information is detrimental to decision making because of noise
  • Heart rate in the 110-145 range is optimal for activities while retaining control. Most people in danger reach ‘arousal’ state. In this state, we have heart rate above 145 and this causes temporary autism: we fail to read faces, fail to perform simple tasks i.e. call 911 (000 in Australia, 113 in Vietnam)
  • Subconscious of experts is more reliable than that of non-experts because experts have trained their subconscious to filter noise and trained themselves to control their subconscious
  • Noise: stereotype, social correctness tendency, insignificant factors. All at subconscious level
  • How to train subconscious :
    • Gerontocratically expose ourselves to the condition of using the skill over and over again
    • Think about it, dream about it, be obsessed about it
    • Control the environment for the skill to be ingrained into our subconscious. Skills may be: control heart rate, perform a trained task, read faces, trade…

Image courtesy: Cartoon Stock

How to turn off Facebook Group communication

By , August 9, 2011 6:53 pm

Go to Group Homepage Top right corner: click Edit Settings Unselect the options for email communication and group chat box.


By , August 9, 2011 6:52 pm

This is a true story.

University X does not require GMAT for its graduate business programs. Obviously, no applicant bothered taking the GMAT.

One student who had GMAT 780 (over 800) applied and got admitted.

The school published its average GMAT intake 780, 9.24% higher than that of Wharton.

Does normal distribution assumption hold?

By , August 9, 2011 6:52 pm


Kindle further boosts my concentration

By , August 9, 2011 6:51 pm


Kindle further boosts my concentration

by Tai Tran on Tuesday, November 9, 2010 at 9:44pm

Apart of informational noise, Kindle further eradicates these distractions:

  1. Effect of paper quality (and its variation) on my cognition
  2. Effect of font (and its variation) on my cognition. I aichmophobically loathe Times New Roman
  3. Effect of book weight (and its variation) on my cognition
  4. Effect of book thickness (and its variation) on my cognition
  5. Effect of book scent (and its variation) on my cognition

So I can rivet on what I need want: content.

Bad system design: Commonwealth Bank of Australia To Account number text field

By , August 9, 2011 6:50 pm

ANZ bank account number format 1234 5678<font color="#ff0000">9</font> (10 characters, with a space in between the 4th and 5th letters)

Commonwealth bank’s To account number text field accepts 9 characters

When one pastes the ANZ account number in, the last character is automatically truncated

Consequence: wrong account and the sender incurs $2.5 return fee

Good design should have taken this into account, for customer’s sake.

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