Alpha Weight Concentration in a Fundamental Expression

Summary

The document presents a proposed equity alpha expression built from estimated earnings per share, cash flow per share, estimated sales per share, and estimated dividend per share. It reports using a United States top-stock universe with a one-period delay, a maximum stock weight, and decay, then encountering a platform error that says the resulting weights are too concentrated in too few names.

This is a practical example of how an apparently multi-input signal can still produce extreme portfolio weights, especially when the expression combines ratios and divides by an estimated quantity. The document asks how to remedy the problem but supplies no answer, diagnostics, or performance evidence. It therefore identifies a portfolio construction issue rather than teaching a validated fix; any adjustment would need to be tested for concentration, signal behavior, and robustness.

Key ideas

• The proposed equity signal combines per-share fundamental estimates through multiplication and division.
• The user reports that the resulting alpha weights are concentrated in too few stocks.
• The setup includes a stock universe, delay, maximum-weight constraint, and decay parameter.
• The document asks for a remedy but does not provide one or report backtest evidence.

Tags

# Improvement of Alpha Expression


# Improvement of Alpha Expression












I'm newbie user of Websim (websim), given

Alpha Expression : (est_eps * (cashflow/sharesout) * (est_sales/sharesout))/est_dividend_ps

Settings-Region:USA, Universe:TOP3000, delay:1,MAX stock weight : 0.05, decay:5.

the problem is the error message

Alpha weight is too strongly concentrated or too a few stocks are assigned weight.

How to remedy this?

Shown in full with attribution under the source's licence. Licence: CC BY-SA 4.0 (Stack Exchange)

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.