Wells Fargo sold customers an investment that was almost guaranteed to lose them money and told them it was a good way to protect their portfolios. Regulators ordered the bank to pay mom-and-pop investors $3.4 million after its advisers recommended “unsuitable” investments known as volatility-linked products that were “Highly likely to lose value over time.” It’s the latest black eye for Wells Fargo. Over the past 13 months, the bank has admitted opening 3.5 million potentially fake customer accounts, forcing up to 570,000 borrowers into unneeded car insurance, and wrongly charging home buyers fees to lock in mortgage rates.