Trading Strategy and Actual Results

We have been reading a lot of excellent trading strategy on Internet and articles.  Is it really working as advertised?  It would be hard to know the actual results if it's not applied in the real market.

A couple of strategies have been tested in the real market, so we can know if it's as good as it's advertised.

A. the CANSLIM system (CANGX MidCap Growth).

	CANGX	IJK
1-Year	23.84	36.91
3-Year	6.74	9.69
5-Year	2.32	7.07

an article by Larry Swedroe provided more details.

B. the Value Line system (VLIFX MidCap Growth).

	VLIFX	IJK
1-Year	30.06	36.91
3-Year	(-5.34)	9.69
5-Year	(-2.99)	7.07

an article by Larry Swedroe provided more details.

C. the NoLoadFUNDX system (FUNDX MidCap Growth).

	FUNDX	IJK
1-Year	20.51	36.91
3-Year	(-2.44)	9.69
5-Year	2.01	7.07

D. the quant fund from Vanguard Institutional (VSGPX LargeCap Growth).

	VSGPX	JKE
1-Year	24.15	21.69
3-Year	3.85	3.59
5-Year	3.82	2.94

for more details at bloomberg.

Possible causes for the under-performance, a) these are open-end funds, so it's hard to manage the daily inflow and outflow, b) it's hard to execute the enter/exit strategy by not moving the market, slippage occurs, c) transaction costs.