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(Repeats Friday story with no changes to text)

By Natsuko Waki

LONDON, July 19 (Reuters) – Investors have welcomed a recent

rise in bond yields in advanced economies as a sign of recovery

that should boost stocks, but if yields go much higher too

quickly, equities could start to look unattractive.

The scale, as well as the speed of the yield rise is key.

Too rapid an increase in yields would threaten a repeat of the

market crash seen in 1994, when stocks suffered a 10 percent

sell-off as bond yields rallied.

For much of the past 13 years, gradually rising bond yields

have been positive for stocks as they reflect better economic

prospects. But in late June that relationship broke down for the

first time in 2-1/2 years as volatility in bond markets soared

with rising U.S. Treasury yields.

Societe Generale reckons stocks in developed markets, where

much of the money printing that depressed yields took place, can

withstand a further rise in yields of around 140 basis points.

This is how its calculation works. Currently, equities are

largely under-bought because investors see them as risky and

demand a high reward to own them.

The picture is reflected in an unusually high equity risk

premium – the excess return that investors require to hold

stocks over risk-free bonds. In developed markets, the risk

premium currently stands at 5.3 percent, or 530 basis points,

well above the long-term average of 3.9 percent.

It would take a yield rise of more than 140 basis points to

push the risk premium below its long-term average – at which

point bonds would start to look more attractive than shares.

Applying a similar model, U.S. equities can absorb a rise of

around 120 bps in benchmark yields, while the Japanese market

has a larger wiggle room of 207 bps.

But in order not to spook investors, the shift in yields

must be gradual.

“Given the current earnings growth expectations, for the

equity risk premium to normalise, yield has to go up,” said

Roland Kaloyan, asset allocation strategist at Societe Generale.

“But it’s not just the normalisation in yields itself that

counts, but also the speed of the normalisation.”

In emerging markets, yields can rise another 170 bps before

the equity risk premium falls below the long-term average. China

has a comfortable 363 bps of room, while India, where a yield

rise of just 26 bps would be enough to tip the balance, appears

to be the most vulnerable.

Ewen Cameron Watt, chief investment strategist at BlackRock

Investment Institute, believes the market can run with a risk

premium of 3-4 percent before equities become too expensive.

“Real yields in equities at the moment are probably 2-2.5

percent with 5-10 percent dividend growth. You only take three

to four years to get to running 4 percent real yields through

that growth rate,” he said.

FEARS OF 1994

Normally, rising yields reflect a rosy economic picture.

Since 2000, U.S. equity returns were positive in 71 percent of

the months with rising U.S. bond yields, according to Deutsche

Asset & Wealth Management.

But the recent rise in volatility – a sign in markets of

insecurity and uncertainty about the future – may have soured

that relationship.

Bank of America Merrill Lynch’s Option Volatility Estimate

(MOVE) index, which measures implied one-month volatility in

U.S. Treasuries, more than doubled to hit a two-year high as

yields raced to 2.7360 percent earlier this month.

Prior to that, U.S. yields moved to 2.66 percent from 2.16

percent in four trading sessions in June.

“That leg caused wobbles in the equity markets and gave the

folks fears of another 1994-style scenario,” said John Bilton,

European investment strategist at Bank of America Merrill Lynch.

In early 1994, U.S. yields rose 150 bps in the matter of

four weeks or so, sending the S&P; 500 stock index down 10

percent in the process. The move came after a build-up of

inflationary pressures prompted a surprise Federal Reserve

interest rate hike.

While the volatility spike is similar, the economic

situation today is a little bit different. Inflation remains

benign and the Fed has repeatedly said its plan to scale back

its monetary stimulus depends on the economic recovery, and that

monetary policy will remain loose for the foreseeable future.

“Riskless rates can rise much more quickly than the equity

risk premium can contract,” said Bilton.

“Equity markets can absorb a gradual rise in yields. But

it’s the pace that can be destabilising.”

(Editing by Catherine Evans)