Investment strategies that derive from signals interpretable through financial statement
analysis have been quite popular in literature. Notable among them have been Ou and Penman
(1989), Lev and Thiagarajan (1993). In addition, simple models using market-based signals
have also been popular among investors and analysts (for example, see Lopes and Galdi,
2007). One of the most popular market-based signals has been the book-to-market ratio and
it has been established that high book-to-market stocks/portfolios, popularly called value
stocks/portfolios, outperform the markets.
On the other hand, the low book-to-market strategy has been equally popular and was
probably motivated by professional investors’ herding on growth stocks (low book-to-market
stocks) expecting that herding would lead to return continuation in growth stocks with
strong appreciation in past. However, a practical problem that can potentially be faced by
many investors is: “Are all low book-to-market stocks, growth stocks?” Certainly not; as Mohanram (2005) emphasized, less than 48% of all low book-to-market stocks1 earned positive
returns in two years following the formation of the portfolio. Aspris et al. (2013) found similar
performance in the Australian context (44% stocks) as also Athanassakos (2013) in the
Canadian context (50% stocks). Clearly, there is something more than just the book-to-market
ratio for a stock to be classified as growth stock and this ‘something’ could help investors
discriminate, ex ante, between eventual strong and weak stocks (Aggarwal and Gupta, 2009).
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