| Issued By: | US SEC | 
| Description: | 
 Represents the Risk/Return Summary portion of SEC Form N‑1A according to the final rule 33‑8998.  The 2010 Risk/Return Summary taxonomy has been updated from its 2008 release primarily with technical changes to enhance the rendering of XBRL-tagged documents. 
 | 
| Explanatory Page: | |
| Physical Location of Files: | 
 Entry Points: 
http://xbrl.sec.gov/rr/2010/rr-cal-2010-02-28.xsd http://xbrl.sec.gov/rr/2010/rr-def-2010-02-28.xsd http://xbrl.sec.gov/rr/2010/rr-ent-2010-02-28.xsd http://xbrl.sec.gov/rr/2010/rr-pre-2010-02-28.xsd Presentation Links: 
http://xbrl.sec.gov/rr/2010/rr-pre-2010-02-28.xml Calculation Links: 
http://xbrl.sec.gov/rr/2010/rr-cal-2010-02-28.xml Definition Links: 
http://xbrl.sec.gov/rr/2010/rr-def-2010-02-28.xml  | 
| Namespace(s): | http://xbrl.sec.gov/rr-cal/2010-02-28 | 
| Recommended Namespace Prefix: | rr | 
| Status: | Complete | 
| Release: | XBRL International Acknowledged | 
| XBRL Version: | XBRL Specification Version 2.1 with errata corrections dated 2008-07-02 | 
| DTS: | |
| Relationship: | 
 Automatically imported: 
http://www.xbrl.org/2005/xbrldt-2005.xsd http://www.xbrl.org/2006/xbrldi-2006.xsd http://xbrl.us/us-gaap/1.0/elts/us-types-2008-03-31.xsd Must be explicitly imported: 
http://taxonomies.xbrl.us/us-gaap/2009/non-gaap/dei-2009-01-31.xsd  | 
| Contact: | Ask-OID@sec.gov or (202) 551-4144 | 

