Wednesday, April 9, 2008
Mathematical Evangalism: The Monty Hall Problem
Suppose you're on a game show. You've made it to the final round, and there are three doors presented. Two of the doors have a goat behind them, meaning you win nothing, and the third holds a new car. Choose the door with the car, and you win that. You make your choice, and before revealing your choice, your host (Monty Hall, hence the name) opens one of the remaining two doors to reveal a goat. He then asks you if you'd like to switch. Is it advantageous to switch doors? What is your probability of winning if you do/do not switch?
...think about it...
...got an answer in mind yet?
The surprising answer is that switching gives you a 2/3 chance of winning. Most people guess 1/2 - there are two doors remaining, and one of them is right. However, let's think of this differently.
When you first choose, you have a 1/3 chance of getting the right door. Then, an incorrect door is revealed. If you were originally right and you switch, you're now wrong. But if you were originally wrong and you now switch, you're right. Because you had an initial chance of 2/3 of being wrong, by switching you now have a 2/3 chance of being right, hence the answer.
Don't believe me? Play a few rounds online and convince yourself.
Tuesday, April 8, 2008
Land Prices
Talk about a way to piss off your most loyal supporters! Everyone currently holding land just took a major hit to their resale value, and my understanding was that land prices had been dropping anyway. While this will certainly encourage new growth, I think there will be a painful period of losses for existing (especially startup) businesses as well. As the new land is sold, those owners can price their rents lower and simply outbid the current ones still paying off their $1,675.
Linden Labs is obviously placing a bet on the elasticity of demand for land. Elasticity, for the uninitiated, is how much the quantity demanded of a good changes with respect to a price change. Some goods, like (some) electronics, are very elastic - small drops in price will produce large sales and vice versa. Other goods, like salt, aren't elastic at all ("inelastic") - you can double the price of salt, and people will still buy about as much as they did before. A few very rare goods, like gasoline, are inelastic in the short run and elastic in the long run...but I'm getting off-topic...
If the demand for new land is elastic, LL will see a large jump in sales for their drop in price. My guess is they're hoping this outweights (a) the amount of anger they're generating, and (b) the amount of extremists who go researching into OpenSim projects.
Let's see how the bet pays off.
Monday, March 24, 2008
A Balance Sheet in Motion
The first question I had when I heard the name "Balance Sheet" was, "well, what does it balance?" The answer is that it is a demonstration the accounting equation is in balance, hence the name. This all-important accounting equation is highly important, and is written as:
Every transaction that a business does affects this equation. Let me go through a few examples. In each of these cases, the amount of the transaction is not important, and so will be represented by x.
Case 1: You spend money on land
Land is an asset. Cash is an asset. Therefore, the equation changes by
Case 2: You take out a loan to buy land
Land is an asset. A loan is a liability.
Case 3: You sell some stock for cash.
Cash is an asset. Stock is an equity.
You'll notice that in all of these cases, the balance equation doesn't change. The x's always cancel out. This is important, because it keeps the equation in balance. The equation should never be out of balance - it indicates an error. This is one of the fastest ways to show if someone knows what they're doing with a balance sheet - if it doesn't balance, it's clearly wrong.
So, you might ask, if the balance equation never changes, how do I show that my business is growing or (hopefully not) shrinking? The answer comes with Retained Earnings (RE). Retained Earnings is an equity account and is basically equal to Net Income - Dividends Paid. Say, for example, that you make some profits and receive them in cash. Your balance equation changes by
You'll notice that even though the entire equation grew by x, the equation is still in balance.
The balance sheet shows the composition of your company, and RE is the mechanism through which the whole company grows or shrinks. There are other accounts which can do this as well, but RE is by far the most common.
I thought it might be instructive to give a series of examples of how a balance sheet for a fictional company might change over time. Therefore, I've developed a Google Document with different tabs, each tab showing a different step in this company's development. At each step, I will only list non-zero accounts, and will provide a proof that the balance equation is working. As a commentary, I'll also post step-by-step comments here that you can read along.
Spreadsheet Link
The first step is boring. A new company is born! However, this company is nothing more than an idea.
All accounts are zero, and the equation is an exciting 0 = 0 + 0. At least it works.
Step 2: The company issues 1,000,000 shares of stock and gets L$1,000,000 cash.
Equities increase and cash increases. Note that I'm not messing with Par Value for this example.
Step 3: The company buys a small plot of land for L$100,000 and builds a store on it for L$50,000.
Plant, Property, and Equipment is the store, but they had to pay cash for it so this decreases.
Step 4: The company pays a designer L$30,000 cash for the right to sell their designs in the store.
Since the company now has some inventory to sell, the company needs to record the cost of this inventory. Notice that inventory is not equal to the potential revenue from this product, but rather the cost in obtaining it.
Step 5: The company meets another designer and wants to buy their design for L$20,000. However, the company decides to wait and pay this designer at some point later, instead of right now. The designer is OK with this and gives the company the designs.
Now the company has a liability, called "Accounts Payable" because they will at some point have to pay this new designer. However, they also got inventory to sell in exchange for taking on this liability. Notice that this is the first point in this exercise where the company has actually changed value from their original L$1,000,000. This is because they are leveraging themselves using debt, which will eventually need to be paid back with another asset (probably cash). When this happens, the liability will disappear, along with the corresponding amount of cash to go with it.
Step 6: The company spends L$100,000 advertising their wonderful new business.
Marketing is not an asset. It is temporary, and thus is recorded on the income statement. However, we lost cash, and so we still have to make the balance equation work. In order to do this, imagine an income statement with just one entry on it: marketing expense of L$100,000. This would carry down through to net income, where it would then go to Retained Earnings! That's what's happening here. Because I'm doing this step-by-step this may seem a little strange, but this is what happens every day in business. It's just that the reporting periods clump groups of transactions into time periods, which are easier to understand.
Step 7: The company's advertising pays off! They get L$200,000 worth of sales!
Now Retained Earnings will increase by the revenue they received. Cash will also increase to balance this out.
Step 8: The company decides to pay off that second designer, now they they've sold some of his designs. They send him L$20,000.
Now the liability will go away and cash will decrease.
Step 9: The company issues a dividend for L$50,000 to its shareholders.
Dividends come out of Retained Earnings. The formula for RE is actually
Cash decreases, and so does RE.
Step 10: The company pays L$10,000 worth of tier payments on their land.
This costs cash, and tier payments are on the income statement, meaning they will come out of retained earnings. Therefore, cash and RE both decrease.
Notice how at every transaction, the balance equation is kept in balance. This is demonstrated on every step throughout this elongated example. If at any point the equation is out of balance, something funny is going on or a transaction hasn't been recorded properly, and so it's time to examine the process.
Now I know it's not practical to keep a running balance sheet for most SL businesses. However, I think that most CEOs should at least be aware of how the transactions they're doing affect the balance sheet.
I also know that there are a myriad of topics and situations I have not covered here. Some of these topics get rather involved and can have different meanings depending on what the management is intending. A great example of this is buying back stock. Although it's easy to see that cash decreases, what happens to balance it? Equities should decrease, but how? That's a tricky topic, one which I don't want to touch here.
And now, a word about my accounting partnership:
SLFR Group does not (in my mind) exist to force people who have the unfortunate circumstance of not understanding financial statements into paying for them. Rather, it is to aid in the preparation of these statements and to serve as a check for those who are unsure of their own abilities. I'm here to help, not harm.
iVentures (my partner in SLFR Group) and I are both familiar with the exchange reporting standards and would be happy to assist you in preparing your company's statements.
Friday, March 14, 2008
Options: Lesson 1
Options are power. There are no markets in Second Life that trade options. Some are afraid investors will use them without understanding them. Others are swamped fixing other bugs so that the thought of including derivatives is nearly impossible at present. Regardless, options exist in real life, and they're useful in real life. Whether they ever exist in SL, these lessons will teach you about what options are, how they operate, and how to price them (at least basically). I'll be using some mathematics for this, and the lessons will build on each other.
For our purposes, we will concentrate on options on an underlying stock. However, you should know that options also exist on futures, currencies, indexes, and even other options. Each of these brings a new caveat to the stage, but for my sanity I'm going to stick to cash and stocks.
There are two broad types of options. I'm going to go over them very slowly:
A call option gives the owner the right, but not the obligation, to buy an underlying stock at a specified strike price (K) by time T.
A put option gives the owner the right, but not the obligation, to sell an underlying stock at a specified strike price (K) by time T.
Read those two sentences again. And again. One more time.
Also know that I'm describing American options in the definitions above. If they were European options, they would have ended with "at time T" instead of "by time T." Some of the pricing models will only value European options, but I'll make sure to warn you ahead of time.
If the price of the underlying stock is denoted as S, then the payoff of the call option is
Call Payoff = Max{0,S-K}
This is because if the stock price (S) is below the strike price (K), then you simply choose not to exercise the option (why buy the stock at K when it's selling at S?). If S > K, though, you can buy at K and then sell at S, netting S-K for yourself. Similarly, the payoff for a put option is
Put Payoff = Max{0,K-S}
If the stock price (S) is below the strike price (K), then you can buy the stock at S and sell it at K, netting you K-S. If S > K, then you would prefer to sell at S, and so it is not advantageous to exercise your put option (and thus the value is zero).
That's it for lesson 1. Subsequent lessons will get into the pricing, and then the all-important parity equation and how that functions. More math coming, I promise!
Please, if you have questions, ASK! This material can be very confusing, even for advanced traders. I'm probably going to speed up, not slow down, in the next lesson, so get questions out of the way now. If you're too shy to post them here (even anonymously), then email me at guardian.market@gmail.com.
Tuesday, March 11, 2008
Distractions
Saturday, March 1, 2008
Let the Games Begin!
It's an interesting battle, really. DDE's decision to stay surprised me greatly, as I would have thought that a business being conducted in Linden dollars, established in Linden dollars, and (until now) paying dividends until Linden dollars would have wanted to stay away from changing currencies and paying loads of transaction fees in order to bring any kind of value to their shareholders. But Delicious tends to know what she's doing, so maybe she's got something up her sleeve that I don't know about.
The question in my mind is how many of the WSE's 42 companies will jump ship in the next month. I really can't understand any retail or land company wanting to stay on the WSE now. Scripters and investment firms could still survive in WICs, since the scripters can simply request payment in USD and the investment firms should be savvy enough in whatever currency. I had originally thought the flight would be more severe, but so far it seems like companies are proceeding as normal, much to my surprise.
As to WSE 4.0 itself, I can only conclude that Luke Connell is attempting to reach outside the walls of Second Life, probably for at least two reasons. The first is that if he leaves Second Life and keeps the companies with him, he's outside the reach of Linden Lab's mighty ban hammer. The second reason is that he allows himself to list firms from other worlds, perhaps the Entropia Universe or IMVU. If it works, it could be amazing.
However, also I've got to wonder about the profitability of HCL at this point. We know HCL has defaulted twice on its bonds, and has had no income for 50-some days and counting. HCL owns an island with low occupancy, but tier still comes due, as well as a hefy (and ad-free, I believe) web server. According to the HCL income statements, HCL had L$8.3 million in profit (neglecting the L$2.78 million they owe in bond interest currently*) ending January 1, which is about USD$31,300. I'm not saying they're going bankrupt right away, but between all the expenses (who pays for Connell's RL expenses, anyway?) I've got to wonder if this conversion to WICs isn't just all smoke and mirrors to mitigate some deposit liabilities.
With no one demanding Linden dollars, who is to say what's happening to those dollars? While there may be an initial "dump the WICs" session, I imagine the WIC will be fairly illiquid. Some hefty transaction fees could make sure people keep their "game tokens" as WICs and not as Lindens, allowing Connell free use of all the Lindens deposited into the WSE.
But enough of the theories, I have a more important question to the CEOs of the WSE: Which of you will stand by a twice-defaulted exchange moving away from your primary transaction currency? Which of you will remain next to the CEO who has played a major role in the collapse of not one, but two of Second Life's major banking institutions? And how will you justify it to your investors?
*If anyone can explain to me how you can manage to post an L$8.3 million profit and yet not have L$2.8 million to pay your bondholders with, I'd love to hear that reasoning. Please include the mathematics behind it.
Sunday, February 24, 2008
Lessons in FM: Part VII - Futures
First, I'd like to introduce what a financial derivative is, and from that what a futures contract is and how to value it. A financial derivative has nothing to do with the slope of a tangent line, but rather is an asset which derives its value from some underlying asset. Examples of this include mutual funds, put and call options, interest rate swaps, and futures. These assets all have no value whatsoever on their own, but only derive their value from what some other asset is doing. Many of the stocks in SL are actually financial derivatives.
As a personal note, I love financial derivatives. Financial derivatives are power. I've been asked, and have provided, guides and advice as to how to implement financial derivatives in Second Life to various exchange bigwigs, but so far nothing has come above of it. If any of you are considering doing something with derivatives, please send me an IM - I'd love to be involved.
To me, the most viable financial derivative for Second Life would be a futures contract. A futures contract specifies that an investor will either buy or deliver a set amount of an underlying asset at a set price at a set time. There is no option as to whether or not this sale/purchase will take place - it is set by the contract.
A lot of the numbers you hear tossed about in First Life financial commodities are actually futures numbers. The price of oil, for example, is almost always quoted as a futures price. The same is true with gold, silver, and other precious metals.
So how could you use this in Second Life? Simple - futures on the LindeX. Set up a price and a date, and then you've got a futures contract with USD for L$. Measures would have to be taken to prevent simply bailing out on the contract, but having investors place and x% deposit for taking the contract would probably suffice, depending on what x is.
Regardless, we may wish to know how to price these funky things called futures. It's actually surprisingly simple, and most of the mathematics I've already covered in my first Lessons in FM: Part I - Present Value. Technically, futures contracts with strike prices (the price specified in the contract) equal to the expected cost have zero premium, although in real trading there is always some transaction cost to doing this.
I slipped in the word "expected" to the definition above for a reason. Suppose we're doing a futures contract on a five-year zero-coupon bond yielding 10% per year, costing 1000 now and with an expiration date of 6 months from now. If the strike price is 1000, that contract will actually trade at a premium because 6 months from now the bond is worth more than 1000. We would expect it to be worth
So the contract actually has a value of 48.81. For the contract to have zero premium, it must have a strike at the expected price of 1048.81, and then it will have zero premium.
With the profit equal to
Therefore, to calculate the value for a futures contract expiring at time t, just calculate
Where i is the interest rate being used. i varies depending on what you're valuing. With bonds, it's the interest rate. With stocks, it tends to be the dividend yield. With currencies, it's the interest rate in the currency you're using. So, for my futures contract on the LindeX, we'd have to use the Second Life interest rate (or USD interest rate, if we were buying the Lindens) to discount to present value.
I hope this helps demonstrate what futures are and how they work. As I mentioned above, they're used quite frequently in real-life commodity trading, and almost every farmer in the United States is familiar with them. (They tend to sell futures contracts early in the season to ensure they sell their crop at harvest.) If you have any questions, by all means ask!
GM
Saturday, February 23, 2008
The Depreciation of Trust
On the public relations front, the most pressing issue I can see is newbies who somehow have gone blindly throughout life with no comprehension whatsoever of how a stock market functions. They stumble in, rant about where their money is gone, are pointed to a news posting, and then slowly realize the truth of the matter: Their portfolio is now worth 55% of what it was when they were a happy JTF Bank customer (current SLW price is 0.55-ish).
This problem is compounded by the fact that many of these customers don't speak English as a first language or maybe even at all. I do not fault these people for being confused, as it's a complex enough topic to handle for native speakers like myself. CapEx has made a good effort in reaching out to these people, and I hope CEOs are doing the same. Verballis may be able to help.
However, now it is time to look at another issue of the conversion: Trust. Trust is a funny thing to talk about in the financial, economic, or mathematical sense of the word. It certainly has value, but yet how to value it remains a near mystery. The branch of study known as Game Theory delves into this topic in great detail by applying certain "games" that try to quantify trust into a dollar value. If you ever hear of someone looking for volunteers for a Game Theory study, sign up - you will most likely walk out of the room with cash.
SLW presents another interesting way to try to quantify trust. Arbitrage Wise has promised to pay L$1.03 for each share of SLW at some future date. He has not released a date when this can be expected to occur, however. So, the question then becomes, how much is a promised L$1.03 from Wise worth? As mentioned above, it is currently worth L$0.55.
The far more interesting thing to me, however, is that this value is decreasing. After its initial volatility, SLW appears to have established a downward trend of about L$0.03 per day. (To be fair, one day it did rise L$0.03, but then fell L$0.06 the next.)
The market is giving Wise an idea of how much time it will be willing to wait for him to bring new funds into the market. For former depositors, these shares represent forward contracts of L$1.03 with an unspecified settlement date. I believe what is causing them to increase is a perceived increase in the risk premium or settlement date of SLW, or both. (Note: If anyone would like me to go through the mathematics of this, let me know and I'll work up another Lessons of FM for it. Don't be afraid to ask - it's just too much for this post.) At present, the market appears to be losing faith in Wise's promise at a rate of about 5% per day.
What can be done to avoid this? Well, this post on the CapEx forums caught my eye. While I don't agree with the abrupt manner the request is presented in, I do agree with the premise: it's time for a show of financial power and honestly from Wise. L$100,000 would go a long way towards buying some faith back in SLW, as would a metric posted somewhere showing how many shares have been repurchased to date. Even better is the fact that with renewed faith will come new buyers, pushing the price up and getting the most vocal and impatient of the depositors out the door, which giving the shares to more patient and positive investors.
I await a price spike.
Wednesday, February 20, 2008
SLW Follow-Up
Note: at the time of this writing, SLW has a bid of 0.60 and an ask of 0.64, and has been about that level for nearly 24 hours.
Saturday, February 16, 2008
SLW Conversion Commentary
But let's stop keeping pace with the market at this point. Let's step up our pace and think one or two steps ahead of the general traders. We know the market is expecting a crash, and I've heard several big players say that they'll happily buy up cheap SLW shares from these fools. I may even throw in a few lowball bid offers in hopes of downward spikes. Those big players may keep SLW above the catastropic predictions and calculations the market is currently generating.