Sloan (1996): The Accrual Anomaly and Why Cash is King

#The Paper at a Glance

Title: Do Stock Prices Fully Reflect Information in Accruals and Cash Flows about Future Earnings? Author: Richard G. Sloan (University of Pennsylvania) Published: The Accounting Review, 1996

Richard Sloan’s 1996 paper is considered one of the holy texts of fundamental quantitative investing. It exposed a glaring flaw in the Efficient Market Hypothesis (EMH): investors fixate blindly on "bottom-line" Net Income, utterly failing to look under the hood to see how those earnings were constructed.

Sloan proved that a dollar of earnings generated by cash is not financially equal to a dollar of earnings generated by accounting accruals.

#The Foundation: Accrual Accounting

To understand the anomaly, one must understand accrual accounting.

Under GAAP standards, revenues and expenses are recognized when they are incurred, not when cash actually changes hands. If a company sells 10,000 widgets on credit, it records a massive spike in Revenue and Net Income, alongside an equivalent spike in Accounts Receivable (an accrual). No cash has entered the building.

Sloan formalized earnings into a simple equation:

• Earnings = Cash Flow + Accruals

Accruals are largely driven by changes in non-cash working capital (receivables, inventory) and depreciation. They require estimating the future. Will those receivables actually be collected? Will that inventory sell without a write-down?

#The Core Finding: Differential Persistence

Sloan analyzed decades of Compustat data and found a striking mechanical reality: Cash flows are highly persistent, while accruals are highly mean-reverting.

If an enterprise generates high cash flows today, it is overwhelmingly likely to generate high cash flows tomorrow. However, if a company generates high earnings today driven entirely by a massive buildup in accruals, those earnings will rapidly collapse in the following year as the accruals reverse.

The Market's Blind Spot If markets were perfectly efficient, investors would parse out the accrual component and discount the stock price accordingly. Sloan demonstrated that the market does no such thing.

#Why Does The Anomaly Persist?

It is rare for an anomaly to survive decades after publication, yet the accrual anomaly remains robust. Explanations include:

1. 1Heuristic Processing: Humans are cognitively lazy. EPS is blasted across financial news. Parsing the Statement of Cash Flows requires effort.
2. 2Management Bias: Executives are heavily incentivized via bonuses to hit quarterly EPS targets and will legally stretch accruals to the maximum to hit these bogeys.

In institutional systems, such as the methodologies engineered at Blank Capital, true profitability is always assessed through the lens of cash. Accruals are noise; cash is truth.