The company posted double-digit gains in its first quarter, but investors were disquieted by another number.Powerful bank JPMorgan Chase (JPM -0.02%) is also quite a powerful investment. According to one analyst, the company's shares can easily produce a double-digit return. Read on to get his take on this ever-prominent American lender.A bullish take on a bearish dayIn some respects, the timing is off for a bullish take on JPMorgan Chase. After all, this particular analyst report came mere hours after the ...