Start-up firms often face difficulties in raising external funds. Employing a unique panel dataset covering 9,715 start-up firms over the period 2007-2009, we find that high-tech startups are less likely to use bank finance and face more difficulties in raising bank finance than low-tech...

With the advent in recent years of large financial data sets, machine learning and high-performance computing, analysts can backtest millions (if not billions) of alternative investment strategies. Backtest optimizers search for combinations of parameters that maximize the simulated historical...

Correlation matrices are ubiquitous in finance. Some key applications include portfolio construction, risk management, and factor/style analysis. Correlation matrices are usually estimated from historical empirical observations or derived from historically estimated factors. It is widely...

We prove that high simulated performance is easily achievable after backtesting a relatively small number of alternative strategy configurations, a practice we denote “backtest overfitting”. The higher the number of configurations tried, the greater is the probability that the backtest is...

In weekly intervals, the Swiss stock research firm Obermatt publishes the top 10 stocks in a stock index based on four different investment strategies. This report describes the results of a back testing of this method. It uses prior year year-end financials to identify top 10 stock tips for a...

The use of debt to finance risky entrepreneurial-firm projects is rife with informational and contracting problems. Nonetheless, we document widespread lending to startups in three innovation-intensive sectors and in early stages of development. At odds with claims that the secondary patent...

Using a unique, hand-collected database of all venture- backed firms listed on Germany's Neuer Markt, we analyze the history of venture capital financing of these firms before the IPO and the behavior of venture capitalists at the IPO. We can detect significant differences in the behavior and...

Using a unique, hand-collected database of all venture-backed firms listed on Germany's Neuer Markt, we analyze the history of venture capital financing of these firms before the IPO and the behavior of venture capitalists at the IPO. We can detect significant differences in the behavior and...

Credit Rating Agencies (CRAs) adjust preliminary bond ratings with knowledge beyond publicly available information. These unobserved "soft adjustments" may reflect material non-public information and rating biases due to conflicts of interest, making certain bond characteristics endogenous. We...

Since the early 1990s an unprecedented process of consolidation has taken place in the banking sector in most industrialised countries raising concern of policymakers that it may reduce access to credit for the small business sector. While most of the existing empirical studies have focused on...