Which of the following is not a documented stock market anomaly (i.e., a strategy that appears to deliver positive risk-adjusted profits)?

Invest in the stock market on days Congress is out of session, but invest in riskless securities when Congress is in session.

Invest in value firms with high dividend yields (D/P) or low P/E ratios.

Invest in small stocks in January.

Exploit under-reaction by buying (selling) stocks that have recently announced positive (negative) earnings surprises.

Invest in growth stocks with above average earnings growth in the past 5 years.