Good observation but rest assured you haven’t lost any money due to the merger.
Actually switch is like selling one fund and buying another. Let me explain with your fund.
|Date||1st May||1st June|
|Fund||HDFC Balanced Fund||HDFC Balanced Fund|
|NAV||Rs 157.61||Rs 154.425|
|Amount||Rs 10,000||Rs 9,7981|
So in last 1 month this fund lost 2% (Rs. 200).
On 1st Jun, Switch happened and all units were redeemed from HDFC Balanced and money was invested in HDFC Hybrid Equity Fund.
|Date||1st June||1st June|
|Fund||HDFC Balanced Fund||HDFC Hybrid Equity Fund|
|NAV||Rs 154.425||Rs 52.9140|
|Amount||Rs 9,798||Rs 9,798|
So now if you look at from HDFC Hybrid Equity Fund, It only got Rs. 9,798 from you. Hence, it shows Rs. 9,798 as the invested amount.
This always happens when there is merger on schemes.