Knowledge that Transforms

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Detecting Informed Trading Risk from Undercutting Activity

Journal of Finance 2026 81(4), 2109-2164 open access
ABSTRACT We introduce a simple measure of informed trading risk, , the residual to liquidity quote‐improvement‐to‐deterioration ratio times . When facing with increased informed trading risk, liquidity providers compete less to provide liquidity, reducing their undercutting activity. Reductions in undercutting leave footprints in trade and quote data that are captured by . Unlike prior measures, is easy to construct, can be computed intraday, and is orthogonal to liquidity. The measure outperforms prominent existing alternatives in reflecting the extent of information asymmetry before earnings announcements, predicting unscheduled press releases, and identifying informed trading spillovers around them.

The Drivers and Implications of Retail Margin Trading

Journal of Finance 2026 81(4), 2217-2270 open access
ABSTRACT Using granular data covering both regulated (brokerage‐financed) and unregulated (shadow‐financed) margin accounts in China, we provide novel evidence on retail investors' margin trading behavior and its price implications. We first show that retail investors' decisions to lever up in stock trading despite the hefty borrowing cost is related to their lottery preferences. We then show that margin borrowing affects investors' trading behavior—investors are more likely to liquidate their holdings as they approach margin calls. Finally, we show that margin‐induced trading aggregates to affect asset prices and contributes to shock spillovers across stocks (e.g., from lottery stocks to nonlottery stocks).

Consumption in Asset Returns

Journal of Finance 2026 81(4), 2271-2330 open access
ABSTRACT Using information in returns, we identify the stochastic process of consumption. We find that aggregate consumption reacts over multiple quarters to innovations spanned by financial markets. This persistent component accounts for over a quarter of consumption variation. These shocks command a large and significant risk premium, driving a large share of stocks' and a small yet significant fraction of bonds' time‐series variation. Nevertheless, we find no support for stochastic volatility of consumption driving time‐varying risk premia. Finally, an otherwise standard recursive utility model based on our estimated process explains equity premium and risk‐free rate puzzles with low‐risk aversion.

Partisan Entrepreneurship

Journal of Finance 2026 81(4), 1841-1892 open access
ABSTRACT Republicans start more firms than Democrats. In a sample of 40 million party‐identified Americans between 2005 and 2017, we find that 5.5% of Republicans and 3.7% of Democrats become entrepreneurs. This partisan entrepreneurship gap is time‐varying—Republicans increase their relative entrepreneurship during Republican administrations and decrease it during Democratic administrations, amounting to a partisan reallocation of 170,000 new firms over our 13‐year sample. We find sharp changes in partisan entrepreneurship around the elections of President Obama and President Trump, with the strongest effects among the most politically active partisans: those that donate and vote.

Learning in the Limit: Income Inference from Credit Extensions

Journal of Finance 2026 open access
ABSTRACT Combining a randomized controlled trial with administrative and survey data, this paper shows that credit limit extensions significantly increase total spending and income expectations. By controlling for changes in personal income expectations, the spending response to credit limit extensions weakens by approximately 30%. For financially unconstrained consumers, expectation changes account for around two‐thirds of the spending responses to limit extensions. These findings are consistent with consumers inferring future income from credit supply.

Size, Returns, and Value: Do Private Equity Firms Allocate Capital According to Manager Skill?

Journal of Finance 2026 81(3), 1661-1700 open access
ABSTRACT Using a novel data set linking private equity (PE) deals to individual managers, we document evidence of manager skill in terms of generating net present value (NPV), a performance measure that captures both scale and returns. PE firms have strong economic incentives to raise larger funds and execute larger deals. While relative returns decline with scale, NPV persists and even increases. Skilled managers are entrusted with more capital and achieve better career outcomes, and approximately 40% of NPV is attributable to internal capital allocation decisions. These findings highlight the role of PE firms in creating value through performance‐based capital deployment.

Leader‐Follower Dynamics in Shareholder Activism

Journal of Finance 2026 81(3), 1377-1435 open access
ABSTRACT We propose a theory of coordination and influence among blockholders. Privately informed activists time their trades in sequence to lower acquisition costs, prompting a strategic use of order flows: leader activists create trading gains for their followers, ultimately influencing their willingness to bear greater value‐enhancing intervention costs. Through this channel, informed trades can exhibit predictability, in sharp contrast with Kyle (1985, Econometrica 53, 1315–1335). We explain how this novel predictability shapes free‐rider problems affecting governance, and how it produces price abnormalities analogous to those documented empirically. We also uncover how private information interdependence can be a key catalyst for the mechanism studied.

The Voting Premium

Journal of Finance 2026 81(3), 1321-1375 open access
ABSTRACT We develop a unified theory of blockholder governance and the voting premium in a setting without takeovers or controlling shareholders. A voting premium emerges when a minority blockholder can influence shareholder composition by accumulating votes and buying shares from dissenting shareholders. Our theory reconciles conflicting empirical findings by showing that standard measures of the voting premium often misrepresent the true value of voting rights, increased conflicts between the blockholder and small shareholders do not necessarily raise the voting premium, and the voting premium can even turn negative when small shareholders free‐ride on the blockholder's trades.

Competition Enforcement and Accounting for Intangible Capital

Journal of Finance 2026 81(3), 1217-1263 open access
ABSTRACT Antitrust laws mandate review of mergers and acquisitions (M&As) that exceed an asset size threshold based on accounting standards that exclude most intangible capital. We show that this exclusion leads to thousands of intangible‐intensive M&As being nonreportable. Acquirers in nonreportable deals achieve higher equity values and price markups, especially when consolidating product markets. Furthermore, nonreportable pharmaceutical deals are three times more likely to involve overlapping drug projects, which are subsequently 40% more likely to be terminated. Our results suggest that the growth of intangible assets may exacerbate market power through nonreportable consolidation of the sectors most concerning for consumers.