The Financial Industry Regulatory Authority said it fined several Wells Fargo & Co businesses, RBC Capital Markets, LPL Financial and others a combined $14.4 million on Wednesday for record-keeping problems that may have allowed company and customer documents to be altered. The securities industry’s self-regulator found that the firms failed to keep hundreds of millions of electronic documents in a “write once, read many” format, which would have made it impossible to alter or destroy records after they were written.