Filed pursuant to Rule 424(b)(2)

Registration Statement No. 333-180300-03

March 30, 2015

Pricing Supplement Addendum No. 31 dated March 30, 2015

To Pricing Supplement No. ETN-10/A dated February 23, 2015,

To Prospectus Supplement dated March 23, 2012 and

Prospectus as amended by the Post-Effective Amendment

to the Registration Statement filed on March 19, 2015

Credit Suisse FI Enhanced Europe 50 Exchange Traded Notes due September 10, 2018 Linked to the STOXX Europe 50^® USD (Gross Return) Index (“ETNs”)

Issuer:	Credit Suisse AG, acting through its Nassau Branch
CUSIP/ISIN:	22542D100/US22542D1000
NYSE Arca Ticker Symbol:	FIEU
Aggregate Offering Price of ETNs:	$4,686,400
Public Offering Price per ETN:	$117.16
Principal Amount of ETNs:	$4,000,000
Principal Amount per ETN:	$100.00
Trade Date:	March 30, 2015
Settlement Date:	March 31, 2015
Agent:	Credit Suisse Securities (USA) LLC (“CCSU”), an affiliate of the Issuer
Proceeds to Issuer:	100.00% of the Aggregate Offering Price
Agent’s Discount and Commission:	0.00%.  However, CSSU is expected to charge normal commissions for the purchase of the ETNs and may receive all or a portion of the investor fee. In addition, CSSU our agent for any repurchases at the investor’s option may charge investors a fee, with respect to each ETN that is redeemed prior to the Maturity Date, equal to the product of (i) 0.05% times (ii) the Closing Level of the Index on the Early Redemption Valuation Date or Accelerated Valuation Date, as the case may be, times (iii) the Index Units as of the immediately preceding Trading Day. For a further description of the fees and commissions payable pertaining to the ETNs please see the section entitled “Supplemental Plan of Distribution (Conflicts of Interest)” in the accompanying pricing supplement.

You may lose some or all of your principal if you invest in the ETNs. See “Risk Factors” beginning on page PS-25 of the accompanying pricing supplement for risks relating to an investment in the ETNs.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined that this pricing supplement addendum, or the accompanying pricing supplement, prospectus supplement and prospectus, is truthful or complete. Any representation to the contrary is a criminal offense. The ETNs are not deposit liabilities and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency of the United States, Switzerland or any other jurisdiction.

Credit Suisse