"We can call a strategy overfitted if the returns are much worse on out-of-sample data than in-sample data." - Mansi
"Speaking from an accounting and compliance background, the promotional material and back tests shown by the portfolio manager is an implicit promise about the future. We need to have a set of standards around honest back testing" - Kaushal
"Overfitting is about making sure that our work is long-lasting. I could keep toiling all my life in finding out what would have worked yesterday. Focus on learning lasting truths." -Ankit
"If the strategy was meant for a certain type of market condition then we can call it overfit if that market condition reoccurs and yet the strategy is not able to profit." - Hardik
"The goal is to deliver what we promise. Overfitting fails that promise" - Nilesh