Expert witnesses face increasing scrutiny in litigation, particularly in financial, valuation, and forensic accounting matters. Courts now examine not only qualifications, but also the reliability of the expert’s methodology and reasoning.

For many experts, understanding Rule 702 is essential to protecting admissibility.

What Rule 702 Requires

Federal Rule of Evidence 702 requires expert testimony to be:

• Based on sufficient facts or data
• Produced through reliable principles and methods
• Properly applied to the facts of the case

Judges serve as gatekeepers, determining whether expert opinions meet these standards before testimony reaches a jury.

Recent revisions to Rule 702 reinforced the court’s role in evaluating reliability more aggressively. Experts who fail to demonstrate objective reasoning or sound methodology face a greater risk of exclusion.

Why Financial Experts Face Increased Challenges

Valuation analysts, damages experts, and forensic accountants often deal with assumptions, projections, and judgment calls. This creates opportunities for opposing counsel to challenge:

• Methodology selection
• Reliability of assumptions
• Incomplete analysis
• Lack of supporting evidence
• Signs of advocacy

Studies continue to show that financial experts experience relatively high exclusion rates during Daubert challenges due to reliability concerns.

Common Factors That Weaken Admissibility

Several issues frequently damage expert credibility and admissibility:

• Weak Methodological Support: Using familiar methods without demonstrating why they fit the specific facts of the case can create vulnerability.
• Failure to Address Contrary Evidence: Courts expect experts to evaluate competing explanations and acknowledge unfavorable information.
• Excessive Certainty: Overstating confidence while ignoring uncertainty can make testimony appear biased or unsupported.
• Insufficient Documentation: Poorly documented assumptions and analytical steps reduce transparency and defensibility.

Practical Ways to Improve Reliability

Experts can strengthen admissibility by implementing disciplined processes throughout the engagement.

• Use Structured Analysis: Document assumptions, methodologies, and decision points carefully.
• Test Alternative Approaches: Explain why competing methods were considered and ultimately rejected.
• Seek Peer Review: Independent review helps identify blind spots and unsupported reasoning.
• Acknowledge Limitations: Transparent discussion of uncertainty often increases credibility rather than weakening it.

Objectivity Is a Competitive Advantage

Courts do not expect experts to eliminate every uncertainty. They expect experts to demonstrate intellectual honesty, methodological discipline, and objective reasoning.

Experts who prioritize transparency over advocacy are more likely to survive admissibility challenges and maintain long-term professional credibility.

This blog is part of a larger article that appeared in The Value Examiner in the fall of 2025. You can read the full article here.