Bella Alten operatic career included six Metropolitan premiere performances – Adele in Die Fledermaus (1905), Gretel in Hänsel und Gretel (1905), Saffi in Der Zigeunerbaron (1906), Olga in Fedora (1906), Columbina in Le Donne Curiose (1912), and Lisetta in L'amore Medico (1914). In November 1905 when she sang Gretel in the premiere Metropolitan performance of Hänsel und Gretel, the composer Engelbert Humperdinck was in the audience. This opera received 11 performances that first season and was selected by Theodore Roosevelt's wife as a benefit for the Legal Aid Society. Alten sang Gretel in this opera every season she was with the Met
NSEL case also found evidence of large scale irregularities on the part of these brokers in the NSEL case. A forensic audit by the EOW also revealed hawala transactions, benami trades and client code modifications by these brokers. The NSEL Investors' Action Group (NIAG) – a forum of NSEL investors requested the EOW to take strict action against these brokers who “falsely sold NSEL as an 'arbitrage product.' Several key brokers including Motilal Oswal undertook Power of Attorney to buy/sell/receive/deliver NSEL commodities on behalf of the investors and also opened DMAT (dematerialized) accounts to handle warehouse receipts of commodities in electronic form.