Investment Factor
A-share investment factors: asset growth and capital spending
Investment factors study how fast a company expands assets, capital spending or working capital. Expansion can reflect growth, acquisitions or financing rather than one common signal.
Typical direction
The intended direction must be tested; low asset growth is often studied as a candidate signal rather than a conclusion.
Data
Balance sheet, cash-flow statement and disclosure dates
Refresh
Annual or quarterly reporting cycles
Research hypothesis
Write the hypothesis before reading the backtest
Asset-growth and investment measures may provide information distinct from revenue or earnings growth, but the direction and mechanism need A-share-specific testing.
A factor is a testable research hypothesis, not an investment recommendation or return promise.
Factor health card
Pre-backtest checks for this factor
Research purpose
Test whether investment measures add information distinct from growth and quality.
Refresh and rebalance
Usually follows full financial reporting cycles.
Data timing
Use actual disclosure dates for asset and cash-flow fields.
Neutralisation
Compare within sector and isolate financials and major M&A cases.
Overlapping exposures
Often paired with growth and quality.
Check before use
Flag acquisitions, financing, restructurings and accounting changes.
Definitions
Core measures
Asset growth
Current total assets ÷ prior total assets − 1Flag M&A and financing jumps.
Capex intensity
Capital expenditure ÷ revenue or total assetsAccounting definitions need a data dictionary.
Working-capital growth
Current net working capital ÷ prior net working capital − 1Can be volatile by sector.
Investment spread
High-investment group return − low-investment group returnDirection is an empirical question.
Research protocol
Keep the same research conventions across factors
Data availability
Financial, dividend and share data become available on actual disclosure or implementation dates, not report-period end dates.
Universe and exclusions
Document index membership, listing age, ST, suspensions, delistings and missing-data rules.
Processing and neutralisation
Version winsorisation, standardisation, sector/size neutralisation and missing-value rules.
Tradability
Include price limits, suspensions, participation, fees, slippage and market impact.
Out-of-sample review
Report IC, grouped returns, exposures, turnover and rolling out-of-sample evidence together.
Build and validate
What to test
- 1Test asset growth, capex and working capital separately first.
- 2Repeat results after removing major M&A cases.
- 3Report growth, quality and valuation exposures.
Common pitfalls
- ×Treating asset growth and revenue growth as the same signal.
- ×Using report-period dates rather than disclosures.
- ×Assuming a preferred direction before testing multiple windows.
A-share implementation
A-share checks that belong in the backtest
- Use the actual disclosure or implementation date; do not make a field available at the report-period end date.
- State the universe, listing-age, ST, suspension, delisting and missing-data rules before running the backtest.
- Model price limits, suspensions, fees, slippage and participation limits instead of assuming every close can be traded.
- Asset and cash-flow definitions can differ by industry; preserve a documented data dictionary.
Research prompt
A reviewable starting prompt
“In CSI 300 non-financial stocks, test asset growth, capex intensity and working-capital growth using actual filing dates. Exclude major M&A cases, control for sector, size, value and quality, and report rolling out-of-sample results.”
FAQ
How is investment different from growth?
Growth measures operating outcomes such as revenue or earnings; investment measures inputs such as assets and capex. They can move together but are not interchangeable.
Why study low asset growth?
Some research finds a relationship, but it is a hypothesis to test in a stated A-share universe, not a universal rule.