5th cusp sublord (House of speculation) is Ketu, which is not showing gains. He will invest impulsively.
Your husband is running Saturn Dasa Venus bhukti from 21-05-2017 to 20-07-2020. Saturn and Venus are connected to 8th house (house of disappointments and money house of opponents). Hence he can not recover the amount in this period. He is advised not to invest anything.
Next is Sun bhukti from 20-07-2020 to 02-07-2021. He is advised not to be a middleman or surety to anybody.
If you are interested pray Lord Kartaveeryarjuna to recover the loss. It is your luck.
A weak point in your husband is :
He is stubborn. He will not relish any advise. He wanted to do what all he want even though he gets loss. He will keep silent. He is interested even to go for horse racing also. Ask him to be cautious in investments and risky ventures.
May God Bless You. email@example.com
How much did he invest? how much loss he incurred?
When did he invest?When did he get loss?
Did he invest on single share or number of shares?
You have to give details ,if you want answer. firstname.lastname@example.org
Losses in share market happens only when you do speculative trading using futures and options which are only intended for the govt. to make money from dumb investors who are interested in making quick money out of extreme greed.