The S&P 500 recently reached a new all-time high, and many stocks are at or near their own 52-week highs. But there are two important things for ETF investors to know. First, not all ETFs are near all-time highs. In fact, some are still down by 10% or more from their recent peaks. Second, just because a certain ETF is at a new high doesn't always mean that it's expensive. And with these principles in mind, here are three Vanguard ETFs that look incredibly attractive even with many stocks reaching new highs. ...