His strategy paid off handsomely when Guggenheim was named lead adviser for one of the biggest deals in history - Viagra-maker Pfizer's $160 billion acquisition of Botox-maker Allergan about a 70-billion-pound bid, only for it to be snubbed. Also advising Pfizer however was Bank of America Corp's executive vice chairman of corporate and investment banking, Fares Noujaim, who Schwartz subsequently recruited to Guggenheim.