** Tesla's TSLA.O shares are down 4% to $434.51 after unveiling more affordable versions of its best-selling Model Y SUV and its Model 3 sedans, as the electric-vehicle maker seeks to reverse falling sales and waning market share amid rising competition
** TSLA extended losses following the announcement and is on track for biggest daily percentage decline since October 2
** The sedans will be priced at $39,990 and $36,990, respectively
** Both versions, called Standard, offer 321 miles (516 km) of range and less powerful acceleration than the current higher trims, called Premium
** TSLA is up 7.6% YTD vs NASDAQ Composite Index's .IXIC 18% increase
(Reporting by Chibuike Oguh in New York)
((Email: Chibuike.Oguh@thomsonreuters.com; Phone: +332-219-1834; Reuters Messaging: chibuike.oguh.thomsonreuters.com@reuters.net))