State Space Models

All state space models are written and estimated in the R programming language. The models are available here with instructions and R procedures for manipulating the models here here.

Friday, March 25, 2011

How Bubbles Get Inflated



Jeff Cox, a staff writer for CNBC.com, has written an interesting piece titled "For Investors, Missing Rallies, Not Taking Losses, the Biggest Fear" (here). Cox is also the author, with Peter Tanous, of the apocalyptic book "Debts, Deficits and the Demise of the American Economy" trumpeted in the video above.

Cox's point about the stock market, which has been made by other authors describing the Subprime Mortgage Crisis (here), is that since no analyst can afford to miss their comparative profitability numbers (they are all being evaluated against their peers), everyone has to aggressively follow the next bubble up. When the bubble pops, everyone has the excuse that the market has crashed and "I can't be expected to perform any better than anyone else in this environment."

In my brief, six year experience with the private sector, I have found this to be the pervasive business dynamic. When the company wasn't performing well, there was no pressure on my groups (IT and statistics). Also, when I was short staff, less was expected of my group (keeping a few open positions helped reduce pressure and kept the accountants happy with my budget performance). There was never any idea of building for the future during slow periods. It was always the right now and the "what have you done for me this week".

Such is American business. Cue the apocalyptic trumpets, crash the symbols, preview the next crisis!

Wednesday, March 9, 2011

Which Honeywell Five Year Forecast: Mine or Theirs?













Tonight on CNBC's Mad Money (here), host Jim Cramer interviewed the CEO of Honeywell. What caught my attention, listening to the interview (video above), was Cramer's statement that Honeywell (HON) "...is a cyclical business. In other words, its performance is dependent on the health of the U.S. and global economies".

To the ears of a Random Stock Walker, this means that HON should be neither a random walk nor a business-as-usual stock. It should be clearly linked to cyclical components of either the US or the World economies. The statistical estimation and comparison of state space models supports the assertion. HON is clearly linked to the world economy and especially to cyclical components of the world economy.
Jim Cramer actually used the term "hostage" to cyclical components of the US and World economies. He went on to imply that something had changed with current management and that the company had now become better able to resist cyclical downturns.

Let's compare the "bullish" Honeywell 5-year forecast to a 15-year Random Stock Walker forecast. The bootstrap forecast using the model linking HON to the world economy (this is the best model) does suggest that trends in the world economy (cycles generated by oil shocks?) will not be working in Honeywell's favor.

The graph above displays the long-run attractor for HON. The stock is very choppy, the instability being more a function of shocks rather than cycles in the world economy. The analyst opinion of HON is also not very positive with four out of ten research firms rating it a downgrade. From the Random Stock Walker perspective the price targets are still optimistic with the median target being 64.50, the high target being 71 and the low target being 40. The 98% confidence bands for the bootstrap forecasts never get above sixty and over time get well below 40. Unless something has actually changed, HON looks like a great candidate for the short sellers and their 5-year forecast looks very bullish indeed.

THEORY and METHOD: Honeywell is an interesting example of a company that might have changed with a change in management around 2006. There is not quite enough statistical data to determine whether there has been a break in Honeywell stock performance. This is a good example of a case where statistical forecasting may not be justified. It will be interesting to look back after a few years, test to see whether there was a break in 2006 and see whether the new Honeywell model is really different from the old.

Tuesday, March 8, 2011

E*TRADE Beatdown


The video above is my favorite E*TRADE commercial. For golfers, it is very funny: Skins beatdown, shankapotomus, etc. If you want to keep laughing, follow the other commercials listed at then end of the clip. Before the Super Bowl this year, CNBC interviewed the ad exec from the Grey agency that created the idea (see the credits below). Evidently, the creative approach was to put a bunch of funny people in a room with video editing software and let them improvise. If you want to make your own E*TRADE baby commercial and email it to friends, click here. This is all a lot of fun but how about E*TRADE stock (ETFC)?


ETFC is definitely a business-as-usual (BAU) stock. The BAU designation basically means that the stock is neither a random walk nor is it directly linked to the US or the World economies.
The ETFC bootstrap forecast for 2011 is presented above. The stock went through an awful trough from 2008 to almost the middle of 2010 then rebounded sharply.
The upward jump in the middle of 2010 was actually a return to the dynamic attractor (graphed above). The bootstrap forecast for the attractor shows very tight confidence band between a price of 15 and 17. The analyst opinions of ETFC (here and here) are mixed: Median price target 17, High target 21, Low target 12, and forward P/E 15.6.

I can't think of any reason to be in this highly variable stock except that you either like the commercials or like the E*TRADE trading platform.


Banking Baby was developed at Grey Worldwide, New York, by chief creative officer Tor Myhren, creative director Jonathan Cranin, copywriters Ari Halper and Randy Krallman, art director Steve Krauss, executive producer Bennett McCarroll, and agency producer Alison Horn. Filming was shot by director Randy Krallman via Smuggler, who also provided the voice over. Editorial work was done by Lawrence Young at Cosmo Street. Post production was done at Framestore, New York, by VFX producer Laney Gradus and Flame artists Raul Ortego, Mindy Dubin, Tom Leckie. Audio post production was done at Sound Lounge by Glen Landrum.
View E*Trade Banking Baby in quicktime format at Boards Mag Screening Room.