“Buying the dips” is a bullish description of investing in stocks whose prices have gone down.

We say this is a bullish sentiment because a bearish investor would be more likely to interpret the downturn as a sign of impending doom, or might prefer to play it safe. A “dip” can be loosely defined as a downtrend without much momentum or evidence to support a bearish outlook.

Another way of interpreting a dip would be as an oversold condition, where investor sentiment has caused the price of a quality stock to fall. Bullish investors could maximize their gains in such a scenario by buying low and selling when the stock has recovered and pushed on to new highs. Technical analysis indicators such as Bollinger Bands can be used to identify favorable buying conditions.

What does “Buy to Close” Mean?
What does “Buy to Open” Mean?
What Does 'Buy to Cover' Mean?
What does “Buying on Weakness” Mean?