Correlation between VN Index and other indexes 2006-2009

By , August 9, 2010 7:46 pm


DJIA: 0.7741

S&P 500: 0.7528


FTSE: 0.7374

DAX: 0.8406

Asia & Oceania

NIKKEI 225: 0.7114

HSI: 0.6509

STI: 0.8519

CN SSE: 0.6936

ASX: 0.8507

Romance of three kingdoms

By , August 9, 2010 7:44 pm

Facebook current privacy issue made clear

By , August 9, 2010 7:34 pm
Issue Brief description Severity Why this is severe
Bugs Some privacy options don’t work as they’re supposed to High Just when you are so certain you have setup the proper privacy protection, your profile and activities burst and your private information is exposed.
Version control When Facebook upgrades functions or migrates data, certain functions are temporarily reverted back to the old version. One that occurred to my account was Live Feed Options. Low You thought you have moved on with newer and more interesting things, but suddenly something reverts back to what it was.
Default settings New information or information in sections that are changed by Facebook are, by default, visible to “Everyone”.e.g. Likes and Interests May 2010 Medium It takes users a while to figure out how to set privacy for these sections.
Lack of settings Certain settings are not provided. e.g. Pages I am a fan of Update: this is no longer public on my profile Medium You can’t put control on the items you want.
Changing settings When Facebook upgrade certain features, privacy options related to that feature are sometimes lost. e.g. Option to set for newsfeed not to display comment one writes on his/her friend’s content. I used to set it, and couldn’t find it again. Medium I am confused.

This entry is for LinkHay product team

By , June 7, 2010 7:25 pm

I’ve always been keen on explaining the Why of things. This entry is about Why I chose to use the local product LinkHay, a Vietnamese social news service, over

  1. Relevant community: while Digg clearly has a wider range of influencers, the local community gives me networking opportunities much more relevant to what I’m working on
  2. Relevant contents: contents relevant to the environment I’m working and living in
  3. Good product: fast, fairly good usability and a pleasant enough design
  4. Higher buyer bargaining power: I clearly have more bargaining power in giving feedback, suggestions and requests for a product that has 50,000 users (as of June 2010) compared to 3 million of Digg

LinkHay doesn’t only kill Digg in my online usage, but eats up Twitter as a information gathering tool.

In sum, the ingredients to build a local product to compete with global giants are: a good niché, good product/service and relevance.

The capital market was efficient in predicting the acquisition of Palm

By , April 28, 2010 7:39 pm

M&A normally are big events and many parties want to benefit from them, thus the market is sensitive to M&A, being able to detect deals before it actually happen.

In an acquisition, immediate capital gains are transferred from shareholders of the buyer to those of the seller in the form of premium. Synergistic gains will be realized later by increase in operations of the combined firm.

In the event of an M&A, stock price of the target goes up because shareholders of the target expect to receive an amount exceeding current fair value of the firm in the form of M&A premium from the buyer. Concurrently, stock price the buyer usually falls also because of premium the buyer has to pay the seller.

In light of this knowledge, risk arbitrageurs usually long the stock of the target and short the bidder. This normally put price pressure on both stocks, making target’s higher and buyer’s lower.

In the Palm case, arbitrageurs had taken action nearly 2 weeks before the acquisition announcement by Hewlett-Packard. The capital market was relatively efficient in predicting the acquisition.

Also for this case, price pressure on HP was far more complex since multiple factors may affect the company stock price. Palm stock was simpler, I attributed the increase in stock price partly to the acquisition.

In reality, Palm has been in discussion of selling and HP was indeed a surprise buyer.

How an $1000 investment in Jakarta Composite Index fund has grown

By , April 17, 2010 7:41 pm

To see larger picture, Ctrl+click here
The growth of the index has been further boosted by currency movement favorable to foreign investors.
Data Source:
JKSE: Yahoo! Finance^JKSE
Exchange rate:

Market liquidity and number of transactions

By , April 5, 2010 7:41 pm

Vietnam stock market:

HOSE’s expected extension of trading hours to the evening and long-awaited reduction of settlement cycle to T+2 are anticipated to boost market liquidity.

Number of transactions will likely follow and this creates the opportunity for brokerage firms.

Briefing Facebook design Feb10

By , February 27, 2010 7:45 pm


  1. It received least resistance among users. Partly because this design leaves the feed unchanged.
  2. Control items were changed. The left menu gives me the immediate impression of a Microsoft Task Bar.
  3. The search bar is moved in between, centralizing social search and reminding me of Google. Of course, search is powered by Microsoft Bing.
  4. Strategic move: high-light(er) applications and games without interfering with news feed. War with Apple apps?
  5. Personally I like the idea of utilizing Facebook as a news reader. Apparently it can’t replace Google Reader and Twitter, but many people I care about are on Facebook, not Twitter.

Conclusion: this is what I believe a web platform should be like.

25/1/2010 and interest rate

By , January 24, 2010 7:47 pm

DJIA downturn , concern of East Asian stock markets… are among attempts to explain the break to below 480 of VN Index in the week ending 22/1/2010.

I have a different view. It could have been partly attributable to the speculation that Vietnam interest rate would rise.

On 25/1/2010, the speculation is turned upside down and the market is turned downside up.

Chart: Sacombank Securities website

As always, the grapevines has made the run at the market.

I will run regression to find correlation between DJIA and VNI.

How Facebook is becoming the vampiric skeleton of the Internet

By , January 9, 2010 7:48 pm

Beside Facebook, are you a blogger? vlogger? Twitter user? Friendfeed? Tumblr?

Have you noticed that Facebook has been sucking interactions with your content from your original source into Facebook feed?

If yes, that’s how Facebook is becoming the skeleton of the Internet.

Facebook has becomeubiquitousthat people keep staying inside Facebook, expecting to consume information from everywhere. Facebook is doing well to satisfy this need of convenience, allowing information inflow by both implementing functions itself andproviding the platform for respective service provider to develop Facebook applications.


  1. Convenience for users
  2. Explorability of information world’s largest hub
  3. Distribution of interactions from original site to other hubs, notably Facebook

Anything has its down side. The issues are

  1. Interactions within original service (Twitter, Tumblr) are always richer in essence than two actions “Comment” and “Like” on Facebook. If people keep using Facebook and neglect the other services, this richness is not utilized to its fullest potentials
  2. As a result of (1), innovation elsewhere other than Facebook is gradually killed off
  3. As if to fuel destruction of their “complementors”, Facebook has been cloning interesting nice features of elegant services including Twitter, Tumblr and swallowed Friendfeed

As for me, interactions with my Tumblr items by my connections who use both Facebook and Tumblr are now done on Facebook. More “likes” on Facebook, fewer “reblogs” on Tumblr. These posts are read, liked, then dispersed down Facebook stream. They have not been recreated and passed on by being reblogged.

By becoming the main stream of information, Facebook is killing contents and innovation.

There’s the price publishers pay to distribute information on Facebook. There’s the price other service providers pay to spread contents hosted on them onto Facebook. The price by information consumers residing on Facebook will only be realized when real casualties have been done.

Are you a publisher or a consumer? What do you think?

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