bottom fishing

Short definition from Wiktionary

Noun

1. 1
   Fishing with bait, lines, and other gear used to catch aquatic creatures which inhabit the lowest regions of a body of water, including a seabed or riverbed.
2. 2
   Buying, or seeking opportunities to buy, investment securities or other valuable properties at a time when markets are depressed and prices are low.
3. 3
   Alternative form of bottom fishing.