Monday, February 21, 2011

Market Mean Reversion (ft. a 20 Sharpe Strategy?) - Student's Post

Taken from http://processdriventrading.wordpress.com/page/2/
Picking up from where I left off on my previous post on this topic, I have completed the backtesting of the Andy Lo strategy on survivorship-bias-free data collected right from the most direct source possible. I will let the results speak for themselves:

We see a Sharpe Ratio of ~7. This is pretty good, but the big jump 3 weeks in to 2011 leads us to suspect that there may be some kind of big reversal at some future point. Since survivorship-free data does not exist before 2011, we are forced to wait to collect this information.
What is interesting is that Khandani and Lo predict this strategy will do much better for illiquid stocks. Here is the same strategy on the 100+ stocks on Catalist:
Observe not only is the equity line smoother, but the average return to this strategy is also more than twice that of the one on the Mainboard. Annualizing these returns would indicate that one could get a market-neutral >90% profit every year, unleveraged. The annual risk (stdev) from this strategy would only be ~5%, so the return would be much higher if this strategy was scaled up to the same risk as the market.
Ok.. so what?
This is plainly ridiculous and if it sounds too good to be true, it probably is, but for a very legitimate reason – the difficulty of shorting. The strategy involves going short stocks that outperformed the simple market average and vice versa in order to maintain its market neutrality.
However we can also simulate a long-only version of this strategy by setting all negative weights to zero. This is what we get:

Sharpe actually improves for the Mainboard stocks, and declines but remains at an acceptable 13.4 on the Catalist. Notice also that cumulative profits are approximately halved, allowing the correct inference that the profits from this strategy are equally strong on both the long and short legs.
The money is there, if you want it enough.

D-VaR Position Sizing in SG & HK – a Trading Strategy - Student's Post

Taken from http://processdriventrading.wordpress.com/page/2/

Sometimes, it’s so easy. I was one of only two risk management majors in my graduating class, compared to about 500 Finance majors on the other side of the Field. I still don’t know if it was wise dropping Finance for Risk Management; I only know that it was honest. Risk Management folks are the wet blankets who take the punchbowl away just when the party gets going. Risk Management people avoid the loss of money, instead of looking for ways to gain money. Above all, Risk Management people can’t really be assessed, not on a consistent basis; you cannot objectively manage someone whose job it is to navigate something inherently random, if not unpredictable; risky, if not uncertain. (Aaron Brown has a lot to say about this distinction) Worse still, really trully honest Risk Management folks can’t even be sure of their own value. So when an opportunity comes along to make money purely from Risk Management alone, we jump at it.
Here we take a leaf from CSS-Analytics’ playbook, DVaR position sizing. I’ll make that required reading before you proceed on with this post.
Now see how that looks in SG & HK:
and the “conservative” version:
You will note that although the strategies do better on the two measures of risk, Stdev and Worst Day, they still lose out in CAGR terms. It seems the Risk Management guys save the money but don’t bring home the bacon – but that simply isn’t smart use of Risk Management guys. Since the VaR method frequently makes the portfolio less than fully invested at all times, here are the same charts goalseeked to have 100% weights on average:

It’s a resounding WIN for Risk Management! However note that Sharpe falls whenever the Risk Level parameter is adjusted upwards in order to go for more CAGR. This is an example of the temptation to take on more risk in order to get more return, even when the increase in return doesn’t really justify it.
Notes on this strategy:
  • I actually didn’t need to make so many charts; just the simple fact that Sharpe improves in the strats is sufficient to make these conclusions. It’s just fun to do.
  • Note that the “Actual VaR” measures out of sample 5th percentile returns, and is in all cases in excess of but very close to the “preset” VaR or “Risk Level” parameter at the top of the chart. This means it actually is not a fool’s errand to talk about “risk budgeting”.
  • An excess CAGR of 1-2% a year over more than 30 years can be hard to visualize. This might help:
(yes, HK still outperforms Singapore… grumble.)
In case you were wondering like I was, this strategy has not lost effectiveness yet:

Having played out the trading simulations, I also wanted to think about the source of these profits. Since VaR was the only decision rule, and weights varied according to Risk Level/VaR, then 1/VaR must be predictive of next day returns. Turns out, it isnt:

But that’s only if you think the market has the same reaction to risk downside as well as upside. Lots of academic literature beg to differ. Here is the same thing filtered for only negative days:

q.e.d.

Friday, February 18, 2011

Chinese Trinity of Wealth

Chinese Trinity of Wealth
Copyright © 22 September 2006, Ramcem Hon


A friend of mine inspired me with his philosophy of wealth lately and I wish to share it with you.

In chinese history, there's a saying that success comes from 3 factors namely:

i) 天时 (Heaven Time);
ii) 地利 (Geography Advantage);
iii) 人和 (People's Support)

This philosphy can be clearly seen in the chinese classic, Romance of the Three Kingdoms, where each ruler conquered a part of china by using a predominant strategy. Cao Cao used time, Sun Quan used geography while Liu Bei harness people's support. This create a tripod power of check and balance and represents one of the most exciting time in the history of china.

Now what has chinese ancient wisdom got to do with wealth? Can these principles be applied in today ever changing world?

My friend told me he built and protect his wealth based on the trinity concept. Let's imagine the three concepts as different vehicles.


First, we talk about 天时 (Heaven Time). This vehicle represents something that you have limited control over it. Examples of vehicles include the capital markets such as equities & derivatives. Most of these are what we called paper assets. If properly handled, such vehicles, especially those with tremendous leverage, can make you the most money in the shortest time. 2 of my Singapore friends who retired by age 30 are experts in options trading.

Next, how about 地利 (Geography Advantage)? As you might have guessed, this vehicle represents land and real estate or what we called hard assets. Properly used, this vehicle can create cashflow as well as capital gains hedged against inflation.

Lastly, we talked about 人和 (People's Support). This vehicle basically talks about building business and networks. After all, your net worth is directly proportional to your network. The more people you serve, the more money you can make.


While it is rare to find someone who is a master of all three, all of us should be proficient in at least one of these vehicles. When all vehicles are used properly, it will create a tripod power of your personal wealth fortress.

Hope this article will give you some hindsight on how to build your wealth.

----------
After 3 years in Shanghai, I have read quite a bit of books on such chinese military philosophy translated for business use and I happened to have read about what you have posted and wish to share that there is a part 2 to this philosophy...

With the 3 elements of battle, Tian Shi, Di Li, Ren He, comes 3 classifications of generals...

The Lowest Class Generals uses Ren He (people harmony). Such generals work within their given group and team, win their respect and cooperation in order to achieve the tactical aim of the battle.

The Middle Class Generals uses Di Li (geographical advantage). Such Generals are experts of their territory, knowing every valley and tree and able to use these unique characteristics to their advantage in their own turf.

The Highest Class Generals uses Tian Shi (heavenly timing). Such Generals are experts of opportunity. They have no set preference over territory or kind of troop to be used. They wait, identify and sieze "heavenly opportunities" wherever they go and in whatever battle they fight and are thus able to conquer lands far and wide.

That may even be translated to Robert Kiyosaki's Cashflow Quadrants...

(this part on is from my own interpretation of course)

People from the S quadrant uses Ren He greatly. (insurance sales teams, professional sales teams etc) People relationship and networking is extremely important as all the ground work and actual deals have to be done by himself.

People from the B quadrant uses Di Li greatly. (small business man) They need to know their immediate market very well and be able to exploit the unique advantage in that particular market in order to maximise results.

People from the I quadrant needs Tian Shi. (Global Investors) They need to be very sensitive to arising opportunities and forces all over the world so that they are able to detect profitable investments before anyone else in the world has. He knows that he cannot create his own opportunities as simply as people from the B quadrant can and so train his eyes to look, his ears to listen... intimately and sensitively for the slightest indication that something is brewing somewhere which may lead to a profitable end.

Hope you guys enjoyed it.

Friday, February 11, 2011

STI

For the past two days STI have been going down, looks like a correction, if not the start of bear season. Luckily I have noticed the indicators mostly going downturn for lots of stocks, and had sold some stocks and now sitting on some funds.

Will monitor and see when is the time to go in once the bottom have reached.

Wednesday, February 9, 2011

Your First $1,000,000 Making It In Stocks by Dr Michael Leong

Taken from http://www.bigfatpurse.com/2010/07/your-first-1000000-making-it-in-stocks-by-dr-michael-leong/

Dr Michael Leong is mostly known as the founder of ShareInvestor. He is also a successful stock investor and in his first book, “You First $1,000,000 Making It In Stocks”, he shares his investing philosophy and methods.
A Fundamental Analyst and Value Investor
Primarily, he uses fundamental analysis for stock investment, while at times, he uses “tikam strategy” to play speculative stocks. He opined that fundamental investing is more risky than short term trading, as long as the latter has an exit system to cut losses below 10%. However, he believed fundamental investing is where most money is made as the returns can be several times the capital outlay. At times, the lure of short term trading does seem irresistable, and he says, “I set aside money for fundamental investing and also some money for speculating. The money for speculating keeps my adrenaline flowing, but I know that I am not going to be financially independent just by speculating. Having speculative money also prevents me from itching to interfere with my longer-term fundamental counters.”
Most of the homework is done prior to buying a stock. He spends a lot of time researching and only holds 5 good fundamental stocks. When he buys a stock, he sets a price objective where he will exit to prevent himself from getting greedy and get caught in euphoria. If the fundamentals changed, he would exit too, even with a loss. On the other hand, if the fundamentals remain sound and if the market corrects, he may even average down the stock.
What to look out for in a stock?
A company has to efficiently deploy excess capital - Buying a business that is outside the core competency of the company is undesirable. Buying back shares is better but it is not sustainable, as the demand is supported by the company itself. The best is when the company can invest in it’s own business and grow future profits. If the company cannot find a better use for the excess capital,  he prefers the company to distribute them to shareholders. This is on the premise that shareholders know best how to allocate the money.
Look for companies with higher profit margin and not higher revenue - A $10 million company having a profit of $1 million yields a 10% margin. A $100 million company earning $2 million of profits yield only 2% margin. Hence, in difficult times, the company with the bigger margin can withstand a drop in profits better than one with a smaller margin.
Look for “free” business – Buy stocks that have more net cash in their bank than their market capitalisation. “This means that for every dollar that I invest in these stocks, the company must have at least a dollar in the bank and ideally, the company does not have any borrowings. This also means that the business of the company comes to me as the investor for free. My next assessment is whether this ‘free’ business is sound and is not bleeding too much cash. To do that, I look at the company’s cashflow statement. I am fine if the company declares large losses, so long as these losses are non-cash related. The key is to find ‘free’ businesses that will survive the downturn, so that when the economy turns around, these businesses can regain their former enviable positions during good times.” “Firstly, I much prefer companies that keep their cash in a Singapore bank, as I have more trust in the banking system here. Secondly, cash to me comprises real cash and fixed deposits only. I don’t believe in cash equivalents as this can mean many things, including bonds.”
Low liquidity is good news – A trader should look for shares with good volume, so that he can liquidate when needed. On the contrary, an investor should look for undiscovered gems, and not attractive to many buyers. They are likely to be undervalued as the demand is not high. As he said, “If I am right in my judgement and the stock does well, other investors will climb in later and will create the liquidity to allow me to liquidate my positions.”
Seek capital appreciation, not dividends – “I do not put too much value on dividends when I look at a company, unless of course, the company has a monopoly or has such a strong brand name that they can increase their pricing without affecting the demand.” “It is capital appreciation that is much more important to me than dividends when I invest in shares.”
Margin of Safety – The concept of Margin of Safety is initiated by Benjamin Graham. Most people who practised it use discounted cashflow projections, and forecast 10 years in advance. However, Dr Michael reckoned that given the dynamic nature of businesses, it is even difficult to forecast cashflow of a business for a following year. He uses Net Tangible Assets (NTA) as a measurement yardstick. He defines NTA = cash + Singapore properties, and prefers stocks in a company whose market capitalisation is less than NTA. In this way, the existing business is as good as free to the investor. This is the margin of safety that he looks out for. He will also visit the properties.
What to do when market cycles change?
Spot megatrend to buy low and sell high – “A megatrend is a trend of the general market that could last for years. One example is the bullish megatrend that started in early 2003 and ended in late 2007. In between these periods, there were a number of mini-trends, which can go up or dowwn daily, weekly or even monthly. Fundamental investors are mainly interested in the megatrends.” Investors must be able to spot megatrends; buying during a dip or correction, and selling when market becomes euphoric or hit exit price. An investor has to be patient and hold onto the winners during the bull run.
Keep some cash for opportunities – “In the event that I cannot find any company with good fundamentals, I will be just as happy sitting on cash and waiting for the next downturn. The market opportunities will always be there if you have money.” “When the market is bearish, I keep on accumulating for my fundamental stocks. As always, I know that my timing is never good. Hence, I have a habit of collecting stocks slowly and I always make sure that I set aside enough funds to keep collecting over a long period of time. As such, I am seldom fully vested in terms of fundamental stocks.”
Use warrants for hedging – Dr Michael uses warrants to hedge against his shares, when he anticipates a market correction. However, it may become a crash and as an insurance he will buy deep out-of-the money warrants, which in this case, he will only gain when the market collapses. Otherwise, the warrants will expire worthless. In fact, he hopes for the latter.
Specifically for IPO stocks
“With IPO stocks, the major shareholders are usually under moratorium for 6 months to a year, meaning that they will not be able to sell their shares during these post-IPO periods. As a result, the free float during these periods will be limited to the number of IPO shares offered for sale. In many cases, this will amount to just 20% of the total number of shares. As supply is limited during these 6 months to a year, the post-IPO stock price can rise sharply if demand is high. But when the moratorium is over, there will be a lot more potential supply of shares, as the major shareholders can then sell theirs. This is the reason why most IPO shares perform well only in the first few weeks of trading, only to fall back to their IPO prices within 6 months of their launch.”
Word of advice
“Investing successfully requires a combination of experience and foresight. It is very tough to get all these experiences when you are young. I always encourage those who want to be successful in the market to excel in what they are currently doing first, as every occupation teaches you something in the university of life. Thereafter, they should try their hand at running businesses. Only after that should they consider investing as a career, as I don’t think you could learn life’s experiences by clicking your mouse and clacking on your keyboard.”
“Wealth will come when you have the experience. Experience only comes when you work on the job. Reading does not, and will not, imbue you with experience. However, there will always be the young who think they are special and know it all. They will be the first causalties in any stock market correction or crash.”
“If you seek financial freedom, you have to put to risk a large chunk of your capital. To reduce the risk on this capital, you have to do your homework and believe in yourself and your selection of stocks.”
Related Posts Plugin for WordPress, Blogger...