The hairs flutter in moving water as flags do in moving air, and the way in which they flutter contains information about the direction and speed of the water moving past them.

绒毛在水中就像气流中的旗帜一样摆动，它们摆动的方式包含着流经它们的水流方向和流速信息。

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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%.

WSJ: Stocks Push Higher