When did Operation Twist end?

Operation Twist is a Quantitative Easing measure first implemented by the US Federal Reserves in 1961 ended in 1965. RBI had carried out Operation Twist in January 2021. The US Federal Reserve had implemented Operation Twist in late 2011 and 2012. You can read about the RBI – Reserve Bank of India [UPSC Indian Economy Notes] in the given link.

Further readings:

1. Monetary Policy – Objectives, Roles and Instruments
2. Non Performing Assets (NPA) – Reasons, Classification, Impact, and Measures to Control NPA