Does academic research destroy stock return predictability?– David McLean

Visiting Asst. Prof. David McLean

The first published paper that I know of to document that returns are predictable across stocks was published in 1972. In that paper, the authors showed that price level predicts returns in that low priced stocks tend to have higher returns than high priced stocks. Since then, this has been an active research area with numerous academic papers showing that various strategies based on observable firm traits (e.g., size, past performance) can predict returns across stocks. Read More »

Corporations hoard cash as a precautionary measure

Visiting Asst. Prof. David McLean

Academic studies have shown that over the past few decades, public firms are increasingly holding large amounts of cash. Curiously, much of this build up in cash savings can be attributed to cash saved from seasoned share issues, which are sales of equity by already public companies.

I examined the share-issuance cash savings of a large number of U.S. firms over a 38-year period. In the 1970s, $1.00 of issuance resulted in $0.23 of cash savings, yet in more recent years, that same $1.00 of issuance resulted in $0.60 of savings. Over my sample period, the amount of cash saved from share issuance increased at an average rate of 2.5% per year.

So what is going on here? My initial reaction was that the firms were issuing shares because their stock was mispriced, thereby taking advantage of naive investors. However, after digging deeper, I found that this was most likely not the case. It turns out that there are good economic reasons for firms to hold onto cash and even to issue shares for the purpose of cash savings.

Consider an emerging pharmaceutical company with a promising pipeline of projects. The company is still early in its lifecycle so its profits are marginal and its cash flows are volatile. The company spends a large amount on R&D and plans to continue doing so in the future. Because the company generates little cash flow, it depends on capital markets to finance its R&D spending.

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