30-yr. securities

As a detective trying to solve the mystery of the crossword clue “30-yr. securities“, first I would consider what the clue is trying to tell me. The term “securities” indicates that this clue is referring to some type of financial investment instrument. The reference to “30-yr.” signifies a length of time, perhaps the duration of the investment.

After analyzing the clue, I would consider a variety of investment options that match this description. Government bonds would be a logical starting point, and Treasury bonds are a type of government bond that come to mind because they are issued by the U.S. government and have a maturity of 30 years. This matches the “30-yr.” portion of the clue.

With this in mind, I would fill in “TBONDS” as the solution to the crossword clue. This answer is short for “Treasury bonds,” and confirms my initial suspicions about the financial instrument being referred to in the clue.

Overall, the thought process required to solve this crossword puzzle clue relied on a combination of knowledge about financial instruments, critical thinking, reasoning, and pattern recognition. Providing a satisfying answer to the puzzle is a bit like cracking a code, and it can be quite rewarding to finally solve the mystery.