By Ellie Ismailidou, MarketWatch

NEW YORK (MarketWatch) -- Treasury yields finished lower after a volatile session Friday, registering a six-day losing streak, the longest since January 7, 2015.

The flight-to-safety was enhanced on Friday, as investors dropped riskier assets during a stock selloff (http://www.marketwatch.com/story/us-stocks-futures-tilt-south-ahead-of-ge-consumer-prices-2015-04-17) fueled by Greek default fears (http://www.marketwatch.com/story/top-eu-official-to-greece-agree-to-reform-by-may-11-or-else-2015-04-17) and new Chinese regulations (http://www.marketwatch.com/story/china-regulators-to-allow-short-selling-by-fund-managers-2015-04-17) that will enable investors to bet that highflying stocks will fall in value.

The market changed direction through choppy trading several times throughout the week, as investors digested mixed economic reports (http://www.marketwatch.com/story/treasury-yields-rise-slightly-after-mixed-reports-greek-selloff-2015-04-16) and diverging comments from Federal Reserve officials, in an effort to discern when the "data-dependent" Fed will deliver the first hike in the benchmark fed funds rate since 2006. Read: Fed shies away from June rate hike (http://www.marketwatch.com/story/fed-shies-away-from-june-rate-hike-2015-04-17).

But the underlying force driving the Treasury market wasn't so much the liftoff date but rather the pace and the stopping point of the increase, especially as liquidity in the market has been drying out recently, said Guy LeBas, chief fixed income strategist at Janney Montgomery Scott.

"There has been a lot of intraday volatility lately, as liquidity is on the light side due to fewer buyers and sellers in the Treasury market," LeBas said.

Despite the volatility, often driven by technical rather than fundamental factors, an overarching theme of soft growth and missed inflation targets emerged from this week's reports, which enhanced the price action in the Treasury market and pushed yields lower.

The yield on the 10-year note was down three basis points on the day and 10.1 basis points over the week to 1.849% after rising to a session high of 1.909% earlier in the day, according to data from Tradeweb.

The yield on the two-year note declined 5.6 basis points over the week but rose two basis points to 0.504% on Friday. And the 30-year bond yield lost 4.1 basis points to 2.516%. Treasury prices move in the opposite direction of yields.

Meanwhile, the eurozone government bond market continued its unprecedented free fall, fueled by the European Central Bank's trillion-euro bond buying program that aims to revive the eurozone's sluggish economy.

The German 10-year benchmark bond yield hit record lows on Friday, declining by 1.5 basis points to 0.073%.

Conversely, the yield on the 10-year Greek bond reached a 29-month high of 13.022% on Friday, as Greece is at risk of running out of cash over the next few months unless it agrees on an economic-overhaul program with its international lenders.

A successful reform deal will unblock the next portion of bailout money for Greece, which could be needed to repay upcoming loans to the International Monetary Fund.

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