The good news is that there are some ways to prevent yourself from raising red flags.

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Not only does that help avoid embarrassing gaffes by raising red flags for unidentifiable names, but it can turn any customer contact into a subtle sales tool.

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Finally, the unlikely sources of funds used to purchase the shares also suggest that Vance and Wellington were keen on avoiding raising red flags by perhaps making large purchases on margin or contacting a bank for a loan.

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Steven Nissen, chairman of cardiovascular medicine at the Cleveland Clinic, who has run clinical trials on many important heart medicines but is perhaps best known for raising red flags on drug safety, including on Vioxx, now withdrawn, and Avandia, which has had its use severely limited.

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However, with the strong gains already clocked by investors this year, some stock strategists were moving in the opposite direction, raising warning flags about the prospect for future gains on a day when demand for Treasurys rose, nudging the yield on the benchmark 10-year note down to 1.95%.

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That passion was inflamed when he began taking his young daughter to a day care facility at a nearby family farm, raising all sorts of questions and red flags about the dairy industry.

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