Explanation

Let's analyze each option:

Option A: A high percentage of illiquid investments or those marked to market by the manager

• This IS a potential fraud indicator because illiquid investments are hard to value objectively, and when marked to market by the manager, it creates opportunities for manipulation and overvaluation.

Option B: Personal trading by managers in the same securities or similar securities as the fund

• This IS a potential fraud indicator as it creates conflicts of interest and potential front-running, where managers might prioritize their personal trades over fund interests.

Option C: Fixed operating costs are above the industry average while manager compensation has a prominent variable component

• This is LEAST LIKELY to be a fraud indicator. While unusual cost structures might indicate inefficiency, they don't necessarily signal fraud. High fixed costs with variable compensation could simply reflect the fund's business model or compensation structure.

Option D: Unusually strong performance claims; e.g., hedge fund performance claims are better than market average over a long period of time

• This IS a potential fraud indicator as consistently superior performance over long periods is statistically improbable and could indicate performance manipulation or misrepresentation.

Therefore, option C is the least likely indicator of hedge fund fraud risk among the choices provided.